Line Teacher Resources

Find Line lesson plans and worksheets
Showing 1 - 200 of 2,411 resources
EngageNY

EngageNY Geometry Module 5: Circles With and Without Coordinates

For Teachers 9th - 12th Standards
A comprehensive 21-lesson math unit challenges high schoolers to wrap their heads around the geometry of circles. Building on a prior understanding of similarity and congruence, length and area, and the properties of geometric figures,...
1 In 1 Collection
Lesson Planet

The Geometry of Letters

For Teachers 3rd - 5th Standards
Use the alphabet as a tool for teaching your class about geometric figures. Break apart capital letters into line segments and arcs. Classify angles as right, acute, or obtuse. Identify parallel and perpendicular lines. An excellent...
2:42
Lesson Planet

Parallel Lines 3

For Students 7th - 9th
Starting with three linear equations, how can you tell which lines are parallel? The first equation is rewritten in slope-intercept form. The second equation represents a horizontal line, so it is already in slope-intercept form. The...
3:29
Lesson Planet

Perpendicular Lines

For Students 7th - 9th
This video demonstrates how to tell algebraically whether lines are perpendicular. Using three different linear equations in different forms, each is rewritten in slope-intercept form, and their slopes are compared to show whether they...
3:03
Lesson Planet

Parallel Lines 2

For Students 7th - 9th
Can you tell, algebraically, if three lines are parallel? In this video, Sal demonstrates how to rewrite linear equations in slope-intercept form and compare the slope of each line.
Lesson Planet

Lines and Patterns

For Teachers 5th - 9th
Here are six outstanding art lessons on geometry, line, shape and form, light and shadow, line and pattern, and tessellation for you. Each activity is well-worth implementing with your art young scholars. These lessons would be...
Lesson Planet

Fitting Lines to Data

For Students 8th - 10th Standards
Scatter the TV sales over weeks. Pupils create a scatter plot to display the number of TV sales over a period of several weeks. The interactive allows class members to create two lines of best fit. Then they determine which line fits...
2:22
Lesson Planet

Perpendicular Lines: Lesson

For Students 9th - 11th Standards
Perpendicular lines are all right. Using the definition of perpendicular, the video lesson introduces perpendicular lines.The portion a basic geometry playlist makes connections between the rules of parallel lines and perpendicular lines.
5:43
Lesson Planet

Parallel and Skew Lines: Lesson

For Students 7th - 11th Standards
Is it possible for a pair to be parallel and skew? The resource provides the class opportunities to find out by examining the properties of parallel and skew lines. Part of a playlist on basic geometry, the video includes a brief...
2:15
Lesson Planet

Perpendicular Lines in the Coordinate Planes: Lesson

For Students 7th - 10th Standards
Get the slope right with two easy steps. By placing two perpendicular lines on the coordinate plane, the video determines the relationship of the slopes of the two line lines. The resource is a part of an informative and extensive...
3:42
Lesson Planet

Parallel Lines in the Coordinate Plane: Lesson

For Students 8th - 10th Standards
Discover the parallel structure of parallel lines. Provided with two parallel lines on a coordinate plane, the presenter shows that the rise and run, or slope, of the two lines are the same. The resource, which is a portion of a larger...
2:55
Lesson Planet

Parallel Lines and Transversals: Lesson

For Students 7th - 11th Standards
Segment transversals proportionally. Given a diagram with three parallel lines and two transversals, the narrator of a short video points out the parallel lines cut the transversals proportionally. The portion of a long playlist on...
1 In 1 Collection
Lesson Planet

Module 7: Connecting Algebra and Geometry

For Teachers 8th - 10th Standards
The coordinate plane links key geometry and algebra concepts in this approachable but rigorous unit. The class starts by developing the distance formula from the Pythagorean Theorem, then moves to applications of slope. Activities...
EngageNY

Tangent Lines and the Tangent Function

For Teachers 11th - 12th Standards
Construct tangent lines and make the connection to tangent functions. An informative instructional activity reviews the geometry origins of the tangent function. Pupils use that information to determine how to construct a tangent to a...
Lesson Planet

Writing Equations for Perpendicular Lines

For Students 9th - 12th Standards
Make the right connections between the equations of perpendicular lines. Pupils find the equation of a line perpendicular to another line in the context of finding the equation of a side of a geometric figure. Learners write their...
Lesson Planet

Investigating Properties of Lines in the Plane

For Teachers 8th - 9th
Practice the properties of lines in the coordinate plane. Young mathematicians use Cabri on their graphing calculator to determine the slope ratios. They use the change in y-coordinates/change in x-coordinates. Additionally, they find...
Lesson Planet

Study Jams! Types of Lines

For Students 4th - 9th Standards
Get jamming with lines and sing along to this karaoke that reviews the main types of lines. Your learners can't forget the main properties of lines when they sing the chorus on the karaoke song after the included slide show. The slides...
2:20
Lesson Planet

Parallel and Skew Lines

For Students 9th - 12th Standards
Parallel lines are often incorrectly defined as lines that do not intersect. The instructor in a concept video explains the difference between parallel and skew lines. He also refers to the correct notation and symbols during the lesson.
Lesson Planet

Connecting Algebra and Geometry Through Coordinates

For Teachers 9th - 10th Standards
This unit on connecting algebra and geometry covers a number of topics including worksheets on the distance formula, finding the perimeter and area of polynomials, the slope formula, parallel and perpendicular lines, parallelograms,...
1 In 1 Collection
Lesson Planet

Lines of Symmetry, Shapes and Symbols

For Students 3rd - 5th Standards
Which shapes are symmetrical? Third graders decide which shapes have lines of symmetry, and which shapes are not symmetrical. They work on 13 shapes and symbols, four of which have lines already drawn through them. Use this resource to...
1 In 1 Collection
EngageNY

Equations for Tangent Lines to Circles

For Teachers 9th - 12th Standards
Don't go off on a tangent while writing equations of tangent lines! Scholars determine the equations for tangent lines to circles. They attempt both concrete and abstract examples, such as a tangent line to the unit circle through (p, 0).
Lesson Planet

Points, Lines, and Line Segments - Reteach 16.1

For Students 3rd - 5th Standards
For this geometry worksheet, youngsters review a chart at the top of the page that includes the definitions of point, line, line segment, parallel lines, intersecting lines, and perpendicular lines. They apply the definitions as they...
Lesson Planet

Line and Rotational Symmetry

For Students 4th - 8th Standards
Challenge young mathematicians' understanding of symmetry. Provided with images of different shapes, letters, and national flags, learners are tasked with identifying the lines of symmetry and order of rotational symmetry associated with...
Lesson Planet

Dilation of a Line: Center on the Line

For Students 9th - 12th Standards
Assessing progress is easy using a quick quiz focused on dilations with the center on the line! Geometry geniuses graph the images of points resulting from a dilation with a center point. Then, they must describe the relationship between...
4:08
Lesson Planet

How Do You Find the Slope of a Line If You Have a Perpendicular Line?

For Teachers 8th - 11th
What kind of lines have slopes that are the opposite reciprocal of each other? Parallel lines? No. Parabolas? No. Perpendicular lines? Yes! Watch and listen as the instructor demonstrates how to make these determinations about...
3:29
Lesson Planet

How Do You Find a Value for x that Makes Two Lines Parallel?

For Teachers 6th - 12th
So you have a transversal line intersecting two parallel lines and you are looking for a value that would make two corresponding angles congruent. You have all the information needed to write an equation to find the value. So write that...
Lesson Planet

Lines to Design

For Students 4th - 6th
In this geometry worksheet, upper graders use pattern blocks as a basis for identifying lines, angles, and shapes. Then they compare and contrast properties of various two-dimensional shapes. Pupils also create a block quilt from paper...
Lesson Planet

Lines and Angles

For Students 4th - 5th
Learners analyze the examples of lines and angles. They label 16 pictures of lines or angles with the correct term.
Lesson Planet

Identify Line Types: Intersecting and Parallel Lines

For Students 6th Standards
Navigate your way through a lesson on types of lines. Individuals drag line segments to illustrate paths between pairs of houses on an interactive map. They determine if these line segment pairs are intersecting or parallel.
Lesson Planet

Equivalent Fractions: Number Line

For Students 3rd Standards
Arrange improper fractions on a number line to determine the equivalency to whole numbers. The number line starts at -4 and ends at 4, while users must turn the improper fraction into a proper fraction in order to place it on the number...
Lesson Planet

Families of Lines: Room in Perspective

For Students 8th - 10th Standards
Get a perspective of lines that share a point. The interactive displays a family of lines that share the same y-intercept. Individuals can find the equations of the lines by moving the line displayed and find what is common about all the...
Lesson Planet

Identify Functions and the Vertical Line Test: The Vertical Line Test

For Students 9th - 12th
There's no easier test than the vertical line test. Learners drag a vertical line across the graphs of several relations in an interactive. They answer a set of challenge questions that focus on whether the graphs represent functions.
Lesson Planet

Vectors as Directed Line Segments: Directed Line Segment

For Students 9th - 12th Standards
Direct your class' attention to directed line segments. The interactive resource allows pupils to create segments with specific endpoints. Scholars plot the initial and terminal points to determine the direction and magnitude of the...
Lesson Planet

Vertical Line Test: Exploration

For Students 8th - 9th
What do vertical lines have to do with functions? Individuals slide a vertical line through four different graphs. They use that vertical line test to determine if the graphs represent functions.
Lesson Planet

Tangent Line Approximation: Estimating Square Roots

For Students 11th - Higher Ed
Estimating a square root is as easy as evaluating a linear equation. Using the derivative of the square root function, pupils calculate an estimation of square roots. Class members determine the equation of the tangent line at the value...
Lesson Planet

Broken-Line Graphs: Heating Curve of Water

For Students 7th - 10th Standards
Examine the unique graphs coined broken-line graphs. Using the phase change of water for data, learners answer questions related to the temperature and energy at different times in the cycle of the phase change. Questions focus on the...
Lesson Planet

Line Graphs to Display Data Over Time: Strawberry Competition

For Students 6th - 8th Standards
Take the tediousness out of graphing. Using the interactive tool, learners can efficiently create a line graph from a set of data. They then use the graph to answer questions about specific trends in the data.
Lesson Planet

Points, Lines, Segments, and Rays Lesson 15-1

For Teachers 4th - 5th Standards
Some of the most important vocabulary in the study of geometry is presented here. In this PowerPoint, learners view the definitions for points, lines, segments, and rays. The definitions and graphics are clear, and kids are also coached...
Lesson Planet

Parallel and Perpendicular Lines: Unity and Variety

For Teachers 4th
Combine math and art by getting your class create a painting with parallel and perpendicular lines. Youngsters design a picture using multiple lines in a variety of thickness and color. They find parallel and perpendicular lines in real...
Lesson Planet

Easy Worksheet: Equations of Lines

For Students 9th - 12th
The class solves 4 short answer problems. They write the equation of a line parallel to a given line passing through a point. Graph paper may be needed.
3:57
Lesson Planet

Distance Between Parallel Lines: Lesson

For Students 9th - 12th Standards
Rely on slope when counting won't do. Using horizontal and vertical parallel lines, the presentation shows scholars how to find the distance by counting. The video uses the relationship of the slopes of perpendicular lines to find two...
3:10
Lesson Planet

Tangent Lines: Lesson

For Students 8th - 11th Standards
Point out properties of a line tangent to a circle. The resource provides two theorems dealing with tangent lines to a circle. A section of a geometry playlist uses the relationship between a radius and a tangent line to find missing...
Lesson Planet

Lines and Angles

For Students 4th - 7th Standards
Why was the obtuse angle upset? Because it was never right! A valuable resource is loaded with background information on types of angles and lines. Learners review the characteristics of parallel, perpendicular, and intersecting lines,...
Lesson Planet

Lines and Angles

For Teachers 9th - 11th Standards
Explore angle relationships associated with transversals. Pupils construct parallel lines with a transversal and find the measures of the angles formed. They figure out how the different angles are related before constructing...
Lesson Planet

Lines and Reflection

For Students 3rd - 6th Standards
Study reflection and lines of symmetry with charts and mirrors! A set of interesting geometric worksheets take kids through a mathematical looking glass with activities about polygons, positive and negative numbers, and geometric patterns.
6:52
Lesson Planet

Intersecting Tangent and Secant Lines of Circles

For Students 9th - 12th Standards
Interpret and apply the relationships between tangent and secant lines. The instructor explains the relationships of the angles and segments created by intersecting tangent and secant lines. 
Lesson Planet

Writing Equations for Parallel Lines

For Students 9th - 12th Standards
Make connections between geometry and algebra concepts. Using a point on a side of a geometric figure and the equation of the line that contains the parallel opposite side, learners find the unknown equation of the line. They write the...
Lesson Planet

Angles and Geometry Activity

For Teachers 3rd - 6th
Get your pupils out of their seats by having them create a cheer complete with arm movements that demonstrate various angles. Working in small groups either during class or recess, young geometers are tasked with having to create a cheer...
Lesson Planet

Differences of Integers Using a Number Line: Football Game

For Students 6th Standards
Make football a math sport! Move the football player (red dot) along the sideline (number line) to see how many yards (positive and negative integers) they've traveled to the other team's end zone.
Lesson Planet

Sample Lesson Plan on Lines and Angles

For Teachers 3rd - 5th
Student complete worksheet using the definitions of lines and angle vocabulary. They define the word and follow a direction given on the worksheet such "construct a line." They complete an online tutorial on how to measure angles using a...
Lesson Planet

3 Lines of Symmetry

For Teachers 4th - 6th
Here is a symmetry lesson which invites learners to explore symmetrical and unsymmetrical shapes. They reconfigure shapes with two or three lines of symmetry, and discover symmetry in pieces of art.
Lesson Planet

Identifying Perpendicular, Parallel and Intersecting Lines

For Teachers 3rd - 4th Standards
Mathematicians explore perpendicular, intersecting and parallel lines. In this geometry lesson, they view a map and identify the intersections. They also identify the parallel avenues on the map. This is a nice lesson that incorporates...
Lesson Planet

Dilation of a Line: Factor of One Half

For Students 9th - 12th Standards
What happens to a dilation when the scale factor is less than one? Learners show and then tell this in a short worksheet. They create a dilation from an off-line point using a scale factor of 0.5. The class then explains how the images...
Lesson Planet

Tangent Line and Radius

For Students 9th - 12th Standards
Explore the relationship between a tangent line and the radius of a circle. Scholars create a drawing that they analyze to determine the connection between a tangent line and radius. The open-ended question allows for multiple solution...
Lesson Planet

Semester 1 Review for Geometry final

For Students 10th
In this geometry activity, 10th graders solve problems that are based on the topics covered in a first semester geometry class, including, linear equations and the equations of parallel and perpendicular lines, the logic of geometry,...
Lesson Planet

Perpendicular Lines

For Teachers 3rd - 6th
In this perpendicular lines practice worksheet, students find and list examples of perpendicular lines at home, at school, and outside.
Lesson Planet

Geometry Definitions

For Students 7th - 9th Standards
Geometry is full of shapes, figures, and corresponding things here and there. The guide shares all of the key pieces of geometric information in a nicely color-coded and labeled sheet. 
Lesson Planet

Stitching Quilts into Coordinate Geometry

For Students 8th - 11th Standards
Who knew quilting would be so mathematical? Introduce linear equations and graphing while working with the lines of pre-designed quilts. Use the parts of the design to calculate the slope of the linear segments. The project comes with...
Lesson Planet

Constructions for Perpendicular Lines

For Students 9th - 12th Standards
To what degree does the class understand perpendicular lines? Find out with this short and simple worksheet! Geometry scholars get the opportunity to show what they know about drawing lines and including points at different locations...
EngageNY

Looking More Carefully at Parallel Lines

For Students 9th - 10th Standards
Can you prove it? Making assumptions in geometry is commonplace. This resource requires mathematicians to prove the parallel line postulate through constructions. Learners construct parallel lines with a 180-degree rotation and then...
3:16
Lesson Planet

Three Undefined Terms: Point, Line, and Plane

For Students 9th - 12th Standards
Defining the undefined is the goal of this video. The instructor explains the important features of a point, line, and plane and how they work together. He also addresses the correct ways to name each and describes the correct notation —...
EngageNY

Families of Parallel Lines and the Circumference of the Earth

For Students 9th - 10th Standards
How do you fit a tape measure around the Earth? No need if you know a little geometry! Pupils begin by extending their understanding of the Side Splitter Theorem to a transversal cut by parallel lines. Once they identify the proportional...
EngageNY

Parallel and Perpendicular Lines

For Students 9th - 12th Standards
Use what you know about parallel and perpendicular lines to write equations! Learners take an equation of a line and write an equation of a line that is parallel or perpendicular using slope criteria. They then solve problems to...
Lesson Planet

Geometry: Assignment #8

For Students 8th - 10th
In this geometry worksheet, students write the equation of the line described in slope-intercept form for 7 questions. They then answer 3 more questions in which they use the drawing of a triangle to determine the equations for various...
EngageNY

Lines That Pass Through Regions

For Students 9th - 12th Standards
Good things happen when algebra and geometry get together! Continue the exploration of coordinate geometry in the third lesson in the series. Pupils explore linear equations and describe the points of intersection with a given polygon as...
EngageNY

Equations for Lines Using Normal Segments

For Students 9th - 12th Standards
Describing a line using an algebraic equation is an essential skill in mathematics. The previous activity in the series challenged learners to determine if segments are perpendicular with a formula. Now they use the formula to determine...
EngageNY

The Distance from a Point to a Line

For Students 9th - 12th Standards
What is the fastest way to get from point A to line l? A straight perpendicular line! Learners use what they have learned in the previous lessons in this series and develop a formula for finding the shortest distance from a point to a...
6:04
Lesson Planet

Finding the Mirror Line

For Students 6th - 11th Standards
Where does the reflection come from? The vivdeo starts with a quick review of the form of the equation of horizontal and vertical lines and diagonals passing through the origin. Using a pre-image and an image of a reflected figure, the...
Lesson Planet

Study Jams! Lines of Symmetry

For Students 3rd - 5th Standards
Line up this lesson when introducing symmetry to your young mathematicians. Watch how two figures are introduced to different ways of folding and identifying whether or not they are actually symmetrical. Finish the lesson with a multiple...
Lesson Planet

Geometry Worksheet II

For Students 7th - 10th Standards
Young geometers get practice with the algebra of angles in an extensive skills practice worksheet. Supplementary, complementary, and vertical angle relationships are used, along with parallel lines cut by a transversal and angle sum of a...
Lesson Planet

Points, Lines, and Line Segments - Homework 16.1

For Students 4th - 5th
In this geometry worksheet, students complete a homework assignment in which they name 3 lines and line segments. They write parallel, intersecting, or perpendicular, to describe the relationships between 4 pairs of lines. They draw an...
Lesson Planet

Tangent Lines and the Radius of a Circle

For Teachers 9th - 12th Standards
Your Geometry learners will collaboratively prove that the tangent line of a circle is perpendicular to the radius of the circle. A deliberately sparse introduction allows for a variety of approaches to find a solution. 
1 In 1 Collection
EngageNY

Secant Lines; Secant Lines That Meet Inside a Circle

For Teachers 9th - 12th Standards
Young mathematicians identify different cases of intersecting secant lines. They then investigate the case where secant lines meet inside a circle.
Lesson Planet

Proving Slope Criteria for Parallel & Perpendicular Lines

For Teachers 9th - 12th Standards
This lesson launches with learners graphing the fourth vertex of a given rectangle, and finding the length and slope of one of its sides; and ends with learners writing a summary sheet for parallel and perpendicular lines. In between,...
Lesson Planet

Identify Line Types: Identify Types of Lines

For Students 6th - 12th Standards
If lines aren't parallel or perpendicular, then what are they? An interactive lets users rotate a line to change its orientation with respect to another line. It then indicates whether the lines are parallel, perpendicular, or...
Lesson Planet

Comparing Equation of Parallel and Perpendicular Lines: Parallel and Perpendicular Lines

For Students 9th - 11th Standards
It seems perpendicular lines have slopes which follow a specific rule. Scholars use an interactive to investigate this rule by moving a pair of lines on a coordinate plane. They find that perpendicular lines have slopes that are opposite...
Lesson Planet

Parallel and Skew Lines: Parallel or Not?

For Students 6th - 12th Standards
There's nothing askew about an informative resource. Pupils adjust one of two lines in an interactive to determine if the lines are parallel or skew. They answer a set of challenge questions about the lines.
Lesson Planet

Understand and Create Line Graphs: Line Graphs

For Students 6th - 8th Standards
Explore line graphs and their characteristics through an interactive lesson. Scholars follow a set of directions to plot data on a line graph. They then answer questions about the type of variables, minimum and maximum values, and...
Lesson Planet

Horizontal and Vertical Line Graphs

For Students 8th - 10th Standards
See how vertical and horizontal lines have special equations. Scholars drag vertical and horizontal lines onto a coordinate plane to graph given equations. They then answer a set of challenge questions on the topic.  
Lesson Planet

Slope of a Tangent Line: Slope of the Tangent and Secant Lines

For Students 11th - Higher Ed
Learn to find the slope through a single point. The interactive provides a visualization of how to find the slope of a tangent line. With the aid of the visualization, pupils see the definition of the derivative in action. Class members...
Lesson Planet

Equations of Perpendicular Lines

For Students 9th - 11th Standards
Investigate how the equation y = -1/x relates to perpendicular lines. Pupils align an arrow using an interactive so it is perpendicular to a bow string. A set of challenge questions helps learners discover slopes of perpendicular lines...
Lesson Planet

Equations of Parallel Lines: Exploring Equations

For Students 9th - 11th Standards
Same slope, different point — what's the same and what's different about an equation? Young mathematicians use an interactive to position a line parallel to a given line and through a given point. They observe that the equation will have...
Lesson Planet

Points that Partition Line Segments: Cutting a Log

For Students 9th - 12th
Teach ratios of line segments using an interactive approach. Scholars examine a line segment in the shape of a log and use their knowledge of ratios to divide it into various partitions. As an introductory lesson, the segment has a...
Lesson Planet

Algebraic Functions: Vertical Line Test

For Students 8th
To be (a function) or not to be (a function). An easy-to-use interactive has pupils drag a vertical line onto several graphs to determine if they represent functions. Some challenge questions assess understanding of this idea.
5:15
Lesson Planet

Angles of Parallel Lines 2

For Students 9th - 10th
Providing an exploration of parallel lines, this resource requires students to not only practice calculations, but also to analyze angles. By asking viewers to decide whether two lines are parallel based upon the information given, this...
3:49
Lesson Planet

Parallel Lines

For Students 7th - 9th
Here is fairly basic video that takes three equations, each written in slope-intercept form, with the goal of determining whether the lines are parallel.  Sal graphs each of the equations on the same coordinate plane to show how their...
5:15
Lesson Planet

Angles of Parallel Lines 2

For Students 9th - 10th
Providing an exploration of parallel lines, this resource requires students to not only practice calculations, but also to analyze angles. By asking viewers to decide whether two lines are parallel based upon the information given, this...
Lesson Planet

Parallel Lines

For Students 7th - 8th
Based on two sets of parallel lines intersected by a transversal, your young geometers determine the measures of 10 angles by applying the definitions of vertical, corresponding, alternate interior, and alternate exterior angles. When...
Lesson Planet

Pythagorean Theorem and Equations of Lines

For Students 8th - 10th
In this Pythagorean Theorem and equations of lines worksheet, students find the lengths of sides of triangles, constructing squares adjacent to sides. Students then find equations of each line in slope intersect form. 
Lesson Planet

Geometry Review Exam

For Students 10th
In this geometry review activity, 10th graders solve and complete 100 various types of problems studied in geometry. First, they find the slope-intercept form of a line passing through two points and parallel to a given line. They also...
Lesson Planet

Tangent Line Demonstration

For Teachers 9th - 12th Standards
High schoolers graph and identify tangent lines. In this geometry lesson, students graph a circle and a line tangent to it. They identify the slope of the line.
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Points, Lines, and Planes

For Teachers 9th - 12th Standards
Students solve problems dealing with points, lines and planes. In this geometry instructional activity, students differentiate between parallel lines and planes. They find the intersection of lines and planes.
Lesson Planet

Geometry Review

For Students 10th
In this geometric figures review worksheet, 10th graders solve and complete 50 various multiple choice problems. First, they find the coordinates of the vertices when a figure is reflected over a line. Then, students name the theorem or...
Lesson Planet

Geometry Lesson 7: Line Segments And Angles

For Teachers 4th
Fourth graders examine and identify line segments and angles using dot paper to draw them. They look at vertical, horizontal, intersecting, parallel and perpendicular lines, draw right angles and angles that are greater than and less...
Lesson Planet

Quiz: Angles with Parallel Lines

For Students 7th - 8th
Middle schoolers identify all pairs of angles formed from parallel lines and a transversal. They use the definitions of alternate interior, alternate exterior and corresponding angles to determine the value of given angles. This one-page...
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Basic Definitions in Geometry

For Teachers 9th - 12th Standards
Can you define that basic figure? Building upon the undefined terms in geometry, the lesson defines basic geometry figures. The resource defines line segment, ray, angle, perpendicular lines, and parallel lines.
Lesson Planet

Connecting Algebra and Geometry

For Teachers 9th - 10th Standards
Connect algebra and geometry on the coordinate plane. The eighth unit in a nine-part integrated course has pupils develop the distance formula from the Pythagorean Theorem. Scholars prove geometric theorems using coordinates including...
Lesson Planet

Module 6: Connecting Algebra and Geometry

For Teachers 9th - 12th Standards
A geometry module connects algebraic reasoning to geometry. It challenges scholars to investigate the slope criteria for parallel and perpendicular lines, prove theorems involving coordinate geometry, and write equations for circles and...
Lesson Planet

Building Blocks of Geometry

For Teachers 8th - 12th Standards
Search high and low for geometry. Using cameras, groups scour the school campus looking for geometric figures. The goal is to collect the most points by finding the higher scoring geometric figures for each category.
Lesson Planet

Accelerated Geometry Review Sheet

For Students 8th - 10th Standards
Your geometry learners use their knowledge of various geometric concepts to write proofs. Starting with givens containing parallel line segments with transversals and triangles and quadrilaterals, and the mid-point and distance formulas;...
1 In 1 Collection
EngageNY

The Inscribed Angle Alternate – A Tangent Angle

For Teachers 9th - 12th Standards
You know the Inscribed Angle Theorem and you know about tangent lines; now let's consider them together! Learners first explore angle measures when one of the rays of the angle is a tangent to a circle. They then apply their newfound...
Lesson Planet

Geometry: Angles, Triangles, and Distance

For Students 7th - 10th Standards
The Pythagorean Theorem is a staple of middle school geometry. Scholars first investigate angle relationships, both in triangles and in parallel lines with a transversal, before proving and applying the Pythagorean Theorem.
Lesson Planet

Parallel Lines, Transversals, and Angles: What’s the Connection?

For Students 9th - 11th Standards
Streets, bridges, and intersections, oh my! Parallel lines and transversals are a present in the world around us. Learners begin by discovering the relationship of the angles formed by parallel lines and a transversal. They then apply...
Lesson Planet

Isosceles Triangles and Special Line Segments

For Students 9th - 12th Standards
Under which conditions can a triangle be classified as isosceles? High schoolers practice identifying isosceles triangles and special line segments, including angle bisectors, medians of triangles, and perpendicular bisectors of sides of...
Lesson Planet

Geometry

For Students 7th - 8th Standards
Help learners find joy in facing mathematical challenges. The questions posed on this learning exercise encourage young mathematicians to utilize skills learned throughout a geometry unit, and to apply themselves and persevere through...
7:59
Lesson Planet

Tangent Lines of Circles

For Students 9th - 12th Standards
A video instructor explains the meaning of a line tangent to a circle. She then works through an application problem applying the tangent-radius relationship.
7:39
Lesson Planet

Length of a Line Segment

For Students 9th - 12th Standards
What's the quickest way to get from point A to point B? Follow the line segment! The concept video demonstrates how to find the length of a line segment. Examples range from numeric to algebraic.
Lesson Planet

Geometry Practice GG 66: Midpoint of a Line

For Students 10th - 11th
In this midpoint of a line worksheet, students examine coordinates and determine the midpoint of a line segment.  This three-page worksheet contains 10 multiple-choice problems.  Answers are provided on the last page.
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Graphing Special Lines

For Students 9th - 12th
In this graphing special lines learning exercise, students solve 18 short answer and graphing problems. Students graph lines given two points. Students find the slope of a line given two points. Students determine if two lines area...
Lesson Planet

Midpoint of a Line Segment

For Students 10th
In this line segment learning exercise, 10th graders identify and solve 10 different problems that include determining the midpoint of a line segment in each. First, they determine the midpoint of a segment that connects two points....
3:01
Lesson Planet

What is a Tangent Line to a Circle?

For Teachers 9th - 11th
This video defines what it means for a line to be tangent to a circle. It also defines the term point of tangency and shows how the radius drawn to the point of tangency is perpendicular to the tangent line.
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Intersecting and Parallel Lines

For Students 6th - 8th Standards
Sometimes line segments just refuse to meet. Young mathematicians connect houses on an interactive map using line segments. They must then determine whether these line segment pairs are intersecting or parallel.
1 In 1 Collection
Lesson Planet

Lines Parallel to a Side of a Triangle

For Teachers 9th - 11th Standards
Your geometry learners will thoroughly explore the Side-Splitting Theorem and how a line, parallel to one of the sides of a triangle, splits the other two sides proportionally. They then collaborate to complete three exploratory tasks...
Lesson Planet

Coordinate Geometry

For Teachers 5th - 6th Standards
Introduce your fifth graders to the coordinate plane, ordered pairs, and plotting points on any of the four quadrants. This wonderful resource makes preparation for your math class quick and easy. It explains everything the class will...
EngageNY

Motion Along a Line – Search Robots Again

For Students 9th - 12th Standards
We can mathematically model the path of a robot. Learners use parametric equations to find the location of a robot at a given time. They compare the paths of multiple robots looking for parallel and perpendicular relationships and...
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Starring....Geometry! - Enrichment 15.1

For Students 3rd - 5th
For this star names worksheet, students draw a star map of the Big Dipper then label the name of each star in the constellation. Next, students answer 2 questions where they identify the stars that form angles greater than and less than...
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Plotting Pairs of Coordinate Points in all Four Quadrants to Construct Lines

For Teachers 5th - 8th Standards
Here is a lesson on coordinates that has pupils view three Cyberchase video clips illustrating the definition of "point" and "line." Along the way, learners will discuss what characters from the videos do, and where problems lie in their...
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Dilation of a Line Segment

For Students 9th - 12th Standards
It's a dilation sensation! Have your young mathematicians show what they know using a short, simple formative check about the dilation of a line segment. Geometry scholars try their hand at constructing a dilation, then must describe how...
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Academic Grade 9 Assessment of Mathematics: Algebra I and Geometry

For Students 9th - 10th
Test your class, or use this 12 page math packet as chapter review. They solve 21 multiple choice problems which require them to graph linear equations, find the volume of prisms and cones, find unknown angles, and determine...
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Geometry: Optional Chapter 3

For Students 8th - 10th
In this geometry worksheet, students answer 6 questions regarding parallel lines, the measures of angles, and slope-intercept equations.
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Reflection in a Line

For Students 10th
For this reflection of a line worksheet, 10th graders identify 10 different reflections of lines as stated in each. First, they determine the image of a point under a reflection across the x-axis. Then, students find x, y, and z of a...
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Line Symmetry

For Students 10th
In this line symmetry worksheet, 10th graders solve and complete 10 different problems that include various types of figures. First, they classify each figure illustrated as horizontal, vertical, both, or neither line of symmetry. Then,...
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Trace a Line of Symmetry

For Students 3rd - 4th
In this lines of symmetry worksheet, young math whizzes analyze pictures of eight common objects and draw a line of symmetry for each.
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Origami Geometry

For Teachers 2nd - 5th Standards
Origami is an excellent way to combine Japanese culture, art, and geometric shapes into one engaging instructional activity! Scholars begin by listening to the story Sadako and the Thousand Paper Cranes and learn the origin of the...
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Parallel and Perpendicular Lines

For Students 9th - 11th
In this Algebra I/Algebra II/Geometry worksheet, students examine the slopes of parallel and perpendicular lines and the relationship to the equation of the line. The four page worksheet contains explanation of topic, worked examples,...
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Parallel & Perpendicular Lines

For Students 4th
For this geometry learning exercise, 4th graders list the lines that are parallel or perpendicular to each other. Then they mark with one color the line segments that are parallel and another color those that are perpendicular.
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Triangles and Parallel Lines

For Students 10th
In this triangles and parallel lines worksheet, 10th graders solve and complete 21 different problems. First, they determine whether the given line segments are parallel in each figure shown. Then, students complete each proportion using...
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Parallel and Perpendicular Lines

For Teachers 4th - 6th
Learners study parallel and perpendicular lines. In this parallel and perpendicular lesson, pupils explore 2-D shapes and determine if the sides are parallel or perpendicular.
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Geometry: Angle Measurement

For Students 9th - 11th
In this angle measurement worksheet, students explore parallel lines with a transversal and then determine the value of all created angles. They find the measure of all angles in similar figures. This one-page worksheet contains...
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The Land of Venn - Geometric Defense

For Students 2nd - 5th Standards
Young mathematicians use their geometry skills to save the Land of Venn in an engaging math game. A fun way to reinforce children's understanding of basic geometric figures and shapes.
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Line Hunt

For Teachers K - 3rd
Young scholars identify lines in everyday images.  In this art analysis lesson, students practice drawing diagonal, vertical and horizontal lines on pieces of chart paper.  Young scholars examine a page from a magazine and identify the...
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Frog Garden Party! Toads and Triangles in the Math Garden

For Teachers 4th Standards
It's frog party time! With frog banners, frog juice, and a triangle hunt, your garden party is sure to be both entertaining and educational. The lesson connects geometry, earth science, and delicious snacks to teach kids about ecosystems...
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Points, Lines, Planes, and Space

For Teachers 9th - 12th
For this points, lines, planes, and space worksheet, students solve word problems dealing with points, lines, planes, and space. Students complete 20 individual problems and 20 group problems.
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Parallel Lines Cut by a Transversal

For Teachers 10th
Geometers explore parallel lines.  In this lesson, they examine the measures of the angles form when parallel lines are cut by a transversal.  The dynamic nature of the Cabri Jr. allows students to discover the relationships between the...
3:17
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Point, Line, Plane, and Space - Geometry Help

For Teachers 3rd - 6th
Inform your teaching or use this clip at an independent work station. Basic geometric concepts of point, line, plane, and space are fully defined and exemplified in a straightforward and clear way. This clip is slow enough for note...
3:13
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What is a Line Segment?

For Teachers 6th - 10th
Line, line segment, segment of a line, what does it all mean? Endpoints, midpoints, names of lines, names of segments. Watch this video and learn the definitions of these terms.
2:47
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How Do You Find a Value for x that Makes Two Lines Parallel?

For Teachers 9th - 11th
So you have a transversal line intersecting two parallel lines and you are looking for a value that would make two corresponding angles congruent. You have all the information needed to write an equation to find the value. So write that...
5:22
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What are Perpendicular Lines?

For Teachers 6th - 10th
Perpendicular lines intersect to form right angles - four of them to be exact. Vertical angles, congruent angles, 90 degrees each, these are some of the special properties of perpendicular lines. Watch this video to find out a couple...
4:23
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What are Skew Lines?

For Teachers 6th - 12th
Skew lines? What? By definition, skew lines are lines on different planes that never intersect. Watch this video and get an explanation along with a visual diagram.
2:15
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Parallel Lines and Transversals

For Students 6th - 10th Standards
Eight is the lucky number of angles when a line crosses two parallel lines. Scholars watch a concise video in the Socratica Geometry series to learn about angles made by parallel lines and a transversal. Using corresponding and vertical...
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Lines and Angles

For Students 4th - 8th
In this lines and angles worksheet, students measure angles, label angles, find unknown angles, and more. Students complete 13 problems and play an angles game.
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Writing Equations for Tangent and Normal Lines

For Teachers 9th - 12th
High schoolers explore the concept of tangent and normal lines.  In this tangent and normal lines lesson, students use their Ti-89 calculator to find tangent and normal lines to a linear and quadratic equations.  High schoolers find the...
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Intersecting Lines and Segments of Measures

For Teachers 8th - 12th Standards
Mathematicians measure intersecting lines-and circles, and create chords. In this geometry lesson, students explore interrior and exterior chords created by tangent and secant lines. These segments can be inside the circleor outside the...
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Line Symmetry

For Students 3rd - 5th
Teach your class about symmetry lines with this resource. This worksheet defines symmetry and explains lines of symmetry and how they work. Learners examine a variety of examples before drawing lines of symmetry in 5 figures. The...
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Geometry: Basic Constructions

For Students 10th Standards
In this geometry worksheet, 10th graders use a straightedge and a compass to construct congruent segments and angles, bisect a segment and an angle, construct perpendicular and parallel lines, construct tangents, circumscribe a circle...
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Solve for Unknown Angles—Angles and Lines at a Point

For Teachers 9th - 10th Standards
How do you solve for an unknown angle? In this sixth installment of a 36-part series, young mathematicians use concepts learned in middle school geometry to set up and solve linear equations to find angle measures.
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Geometry Pad+

For Students 6th - 10th Standards
Graphing paper, pencil, ruler, protractor, and compass, all get replaced or supplemented with this dynamic geometry application. Here, you can create, move, and scale many different shapes, as well as, explore and change their properties...
2 In 2 Collections
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Shortest Line Segment from a Point P to a Line L

For Teachers 9th - 11th Standards
One of the hardest skills for many young geometers to grasp is to move beyond just declaring obvious things true, and really returning to fundamental principles for proof. This brief exercise stretches those proving muscles as the class...
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Plotting Pairs of Coordinate Points in All Four Quadrants to Construct Lines

For Teachers 5th - 8th Standards
Your young graphers are motivated by watching three Cyberchase videos to plot points in all four quadrants, connect pairs of points to make a line segment, and find the point of intersection of two lines.
4:45
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What are Vertical Angles?

For Teachers 6th - 12th
What makes vertical angles so special? Here's a few words that might help you figure out why: intersecting lines, congruent angles, opposite, supplementary angles. Still wondering? Then watch this video for a good explanation of vertical...
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Geometry: Line Segments

For Students 9th - 11th
For this line segment worksheet, students use algebra and geometry to determine the length of a given line segment. They find the midpoint of a line. This two-page worksheet contains seven problems.
9:26
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SAT Prep: Test 2 Section 3 Part 3

For Students 9th - 12th
Covering geometry, linear equations, and mathematical patterns, Sal discusses problems 9-12 on the practice SAT. His easygoing manner and clever calculations will keep students' interest far longer than reviewing SAT questions from a...
3:56
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SAT Prep: Test 7 Section 2 Part 2

For Students 9th - 12th
Test-takers who have a hard time transitioning between math skills will find this video very helpful, as Sal moves quickly through increasingly complicated algebra and geometry problems. Not only are his math techniques top-notch, but...
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Parallel Lines the Transversals that Cross them!

For Teachers 6th - 8th
Students explore parallel lines. In this middle school geometry lesson, students explore the relationships between angles formed by parallel lines cut by a transversal. The dynamic nature of the TI-Nspire or TI-Nspire CAS technology...
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1.2 Points, Lines and Planes

For Teachers 8th - 10th
This is a lengthy overview PowerPoint that defines, explains, shows examples, and has practice problems about points, lines and planes.  The class will need to write many notes and there is an example of how to set up in the Cornell...
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Lines and Angles with K'NEX

For Teachers 6th - 8th
Here is a geometry lesson planwhich invites learners to create models using their knowledge of lines, segments, rays, and angles. This lesson plan reinforces geometric vocabulary and concepts through practical application, it also...
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Construct, Bisect, Duplicate: Geometry Practice with Compass and Straight Edge

For Students 9th - 12th
Geometers employ a straight edge and compass to duplicate and bisect segments and angles, construct perpendiculars, parallel lines, figures, and circles with points of concurrency. Ample practice with 65 questions across 8 worksheets. No...
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Reflections: Balancing Line, Shape, and Color

For Teachers 5th
Fifth graders study repeated lines and colors as they create lines of symmetry. For this math and visual arts lesson, 5th graders examine works of art by Michael Gregory and Martin Puryear to look for colors, lines, and shapes. They use...
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Parallel Lines Cut by a Transversal

For Teachers 9th - 12th
Parallel lines seem so right for each other. It's too bad they'll never, ever meet. Learners use tracing paper to discover relationships among angles formed by two parallel lines cut by a transversal. They apply this information to find...
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Investigating the Slopes of Parallel and Perpendicular Lines

For Teachers 9th - 12th Standards
High schoolers investigate parallel and perpendicular lines. They use Cabri Jr. to construct and explore the relationships between the slopes of parallel and perpendicular lines. The drawing and measurement tools available with Cabri Jr....
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Investigating Equations of Lines

For Teachers 9th - 12th Standards
High schoolers investigate linear equations as they use technology (Cabri, Jr.) to explore the equations of lines in slope-intercept form. The technology allows learners to manipulate the line and observe the changes in the parameters of...
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Points, Lines, and Distance

For Teachers 9th - 12th Standards
Students calculate the distance between two points. In this geometry lesson, students define the meaning of the distance between parallel lines. They find the point of intersection of other lines.
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Creating Parallel Lines and Transversals

For Teachers 9th - 12th Standards
Have your class create parallel lines. Young scholars will learn how to identify the different angles created by a parallel line cut by a transversal. Then, they identify and name similar and different angles.
1 In 1 Collection
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Properties of Tangents

For Teachers 9th - 12th Standards
You know about the tangent function, but what are tangent lines to a circle? Learners investigate properties of tangents through constructions. They determine that tangents are perpendicular to the radius at the point of tangency, and...
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Safe Crossings

For Teachers 7th - 11th Standards
Learners join a task force and learn, “It’s a tool not a toy”, and “safety first,” in this worthwhile geometry task where they are asked to collaboratively construct the plans for a pedestrian bridge that connects two walkways over a...
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Find the Missing Angle

For Teachers 7th - 9th Standards
This one activity requires young geometers to pull together information they are currently learning with things they have learned previously. Here they rely on understanding something about parallel lines, alternative interior angles,...
1 In 1 Collection
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Transformations - Rotations in the Coordinate Plane

For Teachers 8th - 11th Standards
In this geometry lesson, math scholars brainstorm examples of rotations.  Using the SMARTboard, students observe a rotation. They create their own rotation using graph paper. Finally, pupils complete a worksheet and graph rotations.
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Graphs Using Slope-Intercept Form: Zip-Line

For Students 7th - 9th Standards
Zip lines aren't so scary when all your scholars use them for is math. Young mathematicians see how the slope of a zip-line to a building changes as the height changes. They answer a set of challenge questions regarding the scenario.
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Determining the Equation of a Line: Temperature Conversion Challenge

For Students 8th - 10th Standards
Line up the temperature conversions. Pupils create the linear function between Celsius and Fahrenheit on a graph by plotting the freezing and boiling points of water. The scholars determine how the relationship changes based upon...
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Law of Cosines: Building a Zip Line

For Students 10th - 12th
Zip this resource into your lesson plans. Here is an interactive that shows how angles and lengths change based on conditions for a zip line. Scholars use the Law of Cosines to solve problems in this context.
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Directed Line Segments: Dog Park

For Students 11th - Higher Ed Standards
Its a dog's world! Using a vector in standard position, pupils model the path a dog takes to different items in a dog park. The individuals use the interactive to find the magnitude and direction of the directed line segment.
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Graphs of Linear Functions: Line Designs

For Students 8th - 10th Standards
Designs from lines are sublime. Scholars create colorful designs by connecting points on an interactive coordinate plane. They answer questions about slope and quadrants based on their designs.
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Line Symmetry

For Students 10th
In this line symmetry worksheet, 10th graders solve 10 different problems related to various forms of line symmetry. They classify each line of symmetry illustrated as horizontal, vertical, both, or neither. Then students check the...
5:57
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What Does Congruent Mean?

For Teachers 6th - 12th
Two figures are congruent if they have the same size and shape. Line segments can also be congruent if they are of the same length. Vertical angles created by intersecting lines are always congruent. Polygons that have matching angles...
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Points, Lines, and Rays

For Students 3rd - 5th
In this geometry activity, students name the lines on 6 figures as points, lines, a line segment, a ray or a plane. Students write their answers on the lines provided.
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Analytic Geometry

For Students 9th
In this analytic geometry worksheet, 9th graders graph and solve 13 different types of problems that include determining whether equations are linear to matching given equations to their corresponding equation in the second column....
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What Is Hyperbolic Geometry?

For Teachers 9th - 10th
Ninth graders discuss the concept of hyperbolic geometry. They complete Internet geometry activities and write essays comparing and contrasting hyperbolic geometry to Euclidean geometry.
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Equation of a Line

For Students 9th
In this equation of a line worksheet, 9th graders solve 10 different problems that include the equation of a line. First, they determine the equation of a line that has a given slope and passes through a given point on a graph. Then,...
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Line Reflections

For Students 10th
In this line reflections worksheet, 10th graders solve 10 different problems that include determining different line reflections in images. They identify the line reflections in each of the illustrations shown on the sheet. Then,...
1:53
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Duplicating a Line Segment

For Students 9th - 12th Standards
Geometric constructions use simple tools to do complex things. Introduce learners to constructions by copying a segment. A concept video features the proper procedure for performing constructions, so young mathematicans learn the correct...
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Engineering Design Challenge: Exploring Structures in High School Geometry

For Teachers 9th - 12th Standards
Applying their knowledge of theorems about lines, angles, and triangles, groups build a toothpick and stick bridge to support their text book. The teams use the design process to plan, build, test, and refine their bridge designs. The...
1 In 1 Collection
EngageNY

Geometry Module 5: End-of-Module Assessment

For Teachers 9th - 12th Standards
The lessons are complete. Learners take an end-of-module assessment in the last installment of a 23-part module. Questions contain multiple parts, each assessing different aspects of the module.
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Geometry: Hide and Seek

For Teachers 5th - 7th Standards
A geometry game that resembles Battleship is the foundation for hide and seek where "hiders" draw shapes on coordinate planes and "seekers" must guess the shape and its location based on questions and clues. Reproducible, paper-sized...
1 In 1 Collection
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Partitioning a Directed Line Segment

For Teachers 9th - 11th Standards
Your geometry learners will find the point that partitions a directed segment on a coordinate grid into a given ratio using geometric construction tools, the proportional nature of similar triangles, and the distance formula. In their...
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Module 5: Modeling with Geometry

For Students 9th - 12th Standards
Solids come in many shapes and sizes. Using geometry, scholars create two-dimensional cross-sections of various three-dimensional objects. They develop the lesson further by finding the volume of solids. The module then shifts to finding...
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Geometry: Constructions

For Teachers 9th - 12th Standards
Sometimes a compass and straightedge are the correct tools for the job. Scholars use a given line segment to make geometric constructions. These include constructing a copy of the line segment, constructing an equilateral triangle, and...
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Drawing a Line Tangent to a Circle

For Teachers 9th - 12th Standards
Explore lines tangent to a circle. For this math lesson, students manipulate circles and lines on a TI calculator. They draw a circle  and analyze perpendicular lines intersecting the circle in only one place. This activity works best if...
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Bisecting Angles and Line Segments

For Teachers 9th - 12th Standards
Divide figures in two using basic construction tools. A activity introduces the steps to conduct two basic constructions. Using a straightedge and a compass, pupils bisect angles and create the perpendicular bisector of a line segment....
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Flipping Over Symmetry

For Teachers 4th - 5th
In this geometry worksheet, students identify the shape in a set that is not congruent with others. Then they identify the shapes that remain the same even when they are flipped and rotated. Students also locate all of the lines of...
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Existence: One-to-One Functions and Inverses

For Students 11th - Higher Ed Standards
One-to-one means the answer is simple, right? Given four graphs, pupils use a vertical line to test each graph to find out if they are one-to-one. By using the resource, learners realize that not all one-to-one relations are functions....
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Addition and Multiplication Properties with Real Numbers: The Secret of Subtraction

For Students 6th - 8th Standards
An interactive boosts mathematicians' knowledge of subtracting integers using a horizontal number line by way of multiple-choice, true or false, and discussion questions. 
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What's My Line?

For Students 4th - 6th
In this geometry worksheet, students analyze a figure with parallel lines, rays, perpendicular lines and lines. Students use the diagram to answer 7 questions.
1:59
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What are the Endpoints of a Line Segment?

For Teachers 6th - 12th
A simple video on how to identify the endpoints of a line segment. Have your class watch this video to clarify any confusions about endpoints. This could be used as extra help for learners who are having difficulty, or as a supplement to...
3:46
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What are Skew Lines?

For Teachers 6th - 10th
Skew lines? What? By definition, skew lines are lines on different planes that never intersect. Watch this video and get an explanation along with a visual diagram.
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Geometry: Lesson 1: Points, Lines, Segments, Angles

For Teachers 4th
Fourth graders examine the concepts of, draw, and label points, lines, segments, and angles, They draw, label, and identify horizontal, vertical, intersecting, parallel, and perpendicular lines. They complete an associated worksheet that...
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Geometry and Measurement

For Students 5th - 8th
In this geometry and measurement worksheet, learners solve problems involving volume of shapes, line graphs, surface area, and more. Students complete 6 problems.
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Parallel and Perpendicular Lines

For Students 10th - 12th
In this parallel and perpendicular lines worksheet, students find the slope of a line. They identify the slope of a line parallel to another line or find the slope of a line that is perpendicular to a given line. This one-page...
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Parallel and Perpendicular Lines

For Students 10th - 11th
In this parallel and perpendicular lines learning exercise, students identify the slope of a line that is either parallel to a line or perpendicular to the given line. This one-page learning exercise contains ten linear problems.
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Segment Exercises

For Students 3rd - 5th
In this segments worksheet, students draw a figure for each problem where line segments intersect at a certain point and label each line and intersection. Students complete 3 problems total.
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Bring Geometry to Life

For Teachers 9th - 12th
Students explore properties of triangles.  In the geometry lesson plan, students construct the centroid, circumcenter, and the orthocenter of a triangle.  The dynamic nature of Geometer’s Sketchpad allows students to discover important...