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500 resources with the keyterm angles

5:02
Lesson Planet

Why Are the Angles of Equilateral Triangles Always Equal to 60¼?

For Teachers 6th - 10th
Learn how to identify an equilateral triangle by evaluating its congruent sides. Once you've determined that that sides are congruent you'll be able to use the triangle sum theorem to determine the angles in an equilateral triangle. This...
3:20
Lesson Planet

What are Complementary Angles?

For Teachers 6th - 10th
Supplementary, obtuse, acute, complementary angles. It's good to know what all of these mean, but let's focus on one at a time. Complementary angles always add up to 90 degrees. So if given one angle in a complementary angle problem, the...
5:58
Lesson Planet

What is a Triangle?

For Teachers 1st - 5th
Triangles, triangles, triangles. What makes a polygon a triangle? How many types of triangles are there? How do you determine what kind of triangle it is? Watch this video as the teacher explains 'tri' meaning three, making a triangle -...
3:50
Lesson Planet

What is a Point?

For Teachers 6th - 10th
A point is an exact location in space. This tutorial defines the concept of a point as it occurs in graphing, geometry, and algebra. A variety of examples are used to show how important points are and where they'll be seen in the world...
4:47
Lesson Planet

Common Angle Measures

For Teachers 7th - 9th
Using a circle with clock like hands, the tutor explains common angle measurements. She shows that a full circular rotation equals 360 degrees, a quarter rotation equals 90 degrees, a three-quarters rotation equals 270 degrees, and a...
Lesson Planet

Math Doodles

For Students 2nd - 9th Standards
Discover the joy and excitement of improving your math fluency through four different puzzles. Combine those with 25 different ways to represent numbers and you have hours of enjoyment that can be fun outside of the classroom as well.
5:57
Lesson Planet

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...
4:48
Lesson Planet

How Do You Find a Scale Factor in Similar Figures?

For Teachers 6th - 12th
Three angles of one triangle are equal to the corresponding angles in another triangle. Use a ratio of corresponding sides to find the scale factor. Actually, there are two scale factor values. The instructor will explain how to get both...
7:22
Lesson Planet

What are Similar Figures?

For Teachers 6th - 8th
Similar figures have the same shape, the same corresponding angles, but different lengths of their corresponding sides. The teacher explains just what all that means. She demonstrates how to compare the two shapes to prove they are similar.
Lesson Planet

Angles Lesson 15-2

For Teachers 3rd - 5th Standards
The four major types of angles, right, obtuse, acute, and straight are described in this fine presentation. First, the important vocabulary associated with angles is presented, then the types of angles are described. A protractor is...
Lesson Planet

Translations and Reflections of Triangles: Transformation Dances

For Teachers 5th - 8th
Learners explore transformations in dance. In this cross curriculum geometry and dance lesson, students define and identify angles, reflections, and translations, then practice dance movements using a stretchy band that represent these...
Lesson Planet

How Big is the Playground: Creating a Map

For Teachers 7th - 8th
Young scholars create a topographical map of an area outside of the school. In this mapping lesson, students compile data on angles, distances, and key landmarks for a predetermined area on the school grounds to create a map using...
Lesson Planet

Writing Takes Shape!

For Teachers 4th - 8th
Students read The Greedy Triangle and discuss geometric solids. In this geometry lesson, students list the geo-solids in the world and create a graphic organizer to show where geo-solids exist.
Lesson Planet

Exploring and Using Shapes to Make a Dance

For Teachers 2nd
Second graders use their bodies to create various shapes to make a dance when given various music and beats. In this shapes and dance lesson plan, 2nd graders create lines, curves, twists, and angles with their bodies.
Lesson Planet

Drawing Angles

For Students 4th - 5th
Get out those protractors! Once geometers can identify obtuse, acute, right, and straight angles, get them to measure and draw their own. There are six boxes here, each with an angle measurement. Learners use a protractor to draw the...
Lesson Planet

Congruent and Similar Figures - Homework 15.2

For Students 5th - 8th
Use this mathematical figures instructional activity to have learners decide if four sets of figures are congruent, similar or neither. They study two figures in order to solve six measurement problems, and answer one problem solving...
Lesson Planet

Angles, Lines, and Transversals

For Teachers 8th - 10th Standards
Geometers identify and determine angle pair relationships when two parallel lines are intersected by a transversal. They review the concepts of angles by watching streaming video clips online, read definitions of lines and angles from...
Lesson Planet

Identifying Pairs of Angles Formed by Transversals

For Teachers 5th - 8th
Learners review pairs of angles: adjacent, complementary, supplementary, linear, and vertical. They create flashcards by sketching pairs of lines that appear to be parallel with a transversal. They identify pairs of angles by their...
Lesson Planet

Are They Special Angles?

For Teachers 7th - 9th
Middle schoolers identify the correspondence between pairs of angles. They fill in the blank for seven questions. Learners investigate congruency using their graphing calculator and by following detailed directions. They identify...
Lesson Planet

Transversals and Angles - Problem Solving 14.3

For Students 4th - 8th
Upper-elementary and secondary learners use maps to solve word problems showing measurements of angles. They write an expression describing a relationship and identify and label pairs of alternate exterior angles. Pupils solve four...
Lesson Planet

Lines and Angles with K'NEX

For Teachers 6th - 8th
Here is a geometry lessonwhich invites learners to create models using their knowledge of lines, segments, rays, and angles. This lesson reinforces geometric vocabulary and concepts through practical application, it also includes...
Lesson Planet

Congruency

For Students 3rd - 4th Standards
Which triangles are congruent? There are two sets of triangles here for scholars to examine in order to determine which of them are congruent. They use an example and explanatory introduction to guide them through this process. The first...
Lesson Planet

Angles

For Teachers 3rd - 5th Standards
Here is a well-designed presentation on different types of angles for your young geometers. In it, learners view slides that clearly illustrate what these angles are, and how they are formed. Excellent practice when introducing these...
Lesson Planet

The Angles

For Teachers 2nd - 3rd
A very cute presentation on the four types of angles can be found in this resource. Young mathematicians are introduced to obtuse, acute, right, and reflex angles. Charming stick figures are depicted using the angles. Great for use in...