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304 resources with the concept perpendicular lines

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...
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...
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.
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Home Lines

For Teachers 9th - 12th Standards
Using properties of the slopes of parallel and perpendicular lines, pupils write the equations of sides of polygons drawn on the coordinate plane. Scholars create a room following a set of requirements and determine the equations of the...
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Fundamental Property of Reflections

For Teachers 9th - 10th Standards
What do midpoints and perpendicular bisectors have to do with reflections? Learners first reflect line segments over the x- and y-axes. Using the results, they see how the line of reflection is a perpendicular bisector for segments...
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Forget Waldo—Where is 'the Orthocenter'?

For Teachers 8th - 10th Standards
Where is the center of a triangle? Individuals draw perpendicular lines representing the altitudes of a triangle. Finding the intersection gives the location for the orthocenter of the triangle.
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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...
5:03
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Equation of the Normal Line at a Point

For Students 11th - Higher Ed
Is it normal to find a perpendicular line to the tangent line? The short video provides a problem to find the equation of the normal line to a function. Beginning with an explanation of the normal line, the 27th installment in a 31-part...
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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.
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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...
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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 instructional activity defines basic geometry figures. The resource defines line segment, ray, angle, perpendicular lines, and parallel lines.
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Back to the Basics: Constructions

For Teachers 9th - 12th Standards
Create a constructionist approach to constructions. The lesson introduces the concept and tools of constructions. Pupils use worksheets to find a method that will perform the given constructions. The teacher guides the groups and...
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When Will We Ever Meet?

For Teachers 9th - 11th Standards
Investigate the slippery slope of parallel and perpendicular lines. The lesson explores the relationship between the slopes of parallel and perpendicular lines. Pupils use graphing calculators to graph lines with equal slopes and lines...
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Name That Triangle

For Students 9th - 12th Standards
Given a line segment and its perpendicular bisector, pupils visualize a triangle with the endpoints and a point on the perpendicular as its vertices. Learners determine the type of triangle formed and provide a justification for the...
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IGD: Dropping a Perpendicular Line

For Students 9th - 12th Standards
Discover how circles help determine a perpendicular line. Using the applet, scholars construct the perpendicular to a line from a point. The interactive allows pupils to change the position of the line and perform each step of the...
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Proving Slope Criterion for Perpendicular Lines 2

For Students 9th - 12th Standards
What can you say about lines with slopes that are opposite reciprocals? Young mathematicians write a proof about perpendicular lines. They show that if the slopes of lines are opposite reciprocals, then the lines are perpendicular.
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Inscribed Circle Construction

For Students 9th - 12th Standards
Given a triangle, pupils construct a circle inscribed in the triangle. The scholars must determine what center of the circle to use and make the appropriate constructions to find it.
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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...
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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...
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Definition of Perpendicular Lines

For Students 9th - 12th Standards
Get the right definition of perpendicular lines. The short assessment asks pupils to draw a pair of perpendicular lines and label them. The scholars develop a definition of perpendicular lines that contains the right amount of...
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Define a Reflection

For Students 9th - 12th Standards
Develop a definition based upon the performance. Using a line and a point, pupils reflect the point across the line. The learners use the steps in creating the reflection to develop a precise definition of a reflection.
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Constructing a Tangent Line

For Students 9th - 12th Standards
Make sure scholars haven't gone off on a tangent by having them construct one! The learning exercise contains one question with multiple steps of justification needed, giving you an in-depth look into class members' level of...
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Transformations and Symmetry

For Teachers 9th - 10th Standards
Flip, turn, and slide about the coordinate plane. Pupils define the rigid motions and experiment with them before determining the relationships of the slopes of parallel and perpendicular lines. The sixth unit in a nine-part series...
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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...