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### We found 497 resources with the keyterm triangles

Videos (Over 2 Million Educational Videos Available)

5:34

Women's History Activator: Eleanor Roosevelt

3:07

Who was Frederick Douglass?

4:07

Cells - Overview & Introduction

Other Resource Types ( 497 )

Lesson Planet

#### Frog Garden Party! Toads and Triangles in the Math Garden

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...

Lesson Planet

#### Classifying Triangles

If you're looking for a presentation to assist you in your teaching of triangles, this one could be for you. In it, learners are shown how triangles are classified by the size of their angles and by their sides. These are tricky concepts...

Lesson Planet

#### SAT Prep: Test 2 Section 6 Part 2

Reviewing the last problem from the previous video because he feels that he "rushed it," Sal again explains the concept of ratios as it applies to problem 6 on the practice SAT (page 472 in The Official SAT Study Guide). Additional...

Lesson Planet

#### SAT Prep: Test 1 Section 6 Part 4

Number 11 in the practice section of The Official SAT Study Guide begins with finding the perimeter of a given triangle. Once students solve this multiple-choice question, they can find ways to solve the additional problems on the page,...

Lesson Planet

#### SuperShapes, Part 1; "Tri"ing Triangles

An outstanding lesson on triangles awaits your math scholars. Learners focus on the triangle, which is the strongest of all polygons. They see the role that triangles play in the design of buildings, and learn about triangle...

Lesson Planet

#### Telly Plays The Triangle

Big Bird gives Telly a lesson on living vs. non-living things in this film. Telly is afraid to play a musical instrument, a triangle, he is holding because he thinks he might hurt it. After Big Bird tells Telly the triangle isn't living,...

Lesson Planet

#### SAT Prep: Test 3 Section 2 Part 4

Finding perimeters and slopes is the focus of this video, which details ways to solve problems 15-17 on the practice SAT. Even students who are confident in their ability to pass the SAT would benefit from this additional review.

Lesson Planet

#### Stay in Shape

Using their knowledge of right triangles, pupils find out how far a ship is from a light house. Class members determine how far around the world a ship would be sailing at a constant speed.

Lesson Planet

#### Pythagorean Review

It can't be true for all right triangles, can it? A simple interactive lets learners investigate the Pythagorean Theorem. The relationship between the areas of the squares drawn on the sides of a right triangle become apparent with the...

Lesson Planet

#### Triangle Classification

Oh triangle, where are the points that will make your type? Given a line segment, pairs determine the location of a third point to create the six different types of triangles. The teacher provides a jumping off point by leading a...

Lesson Planet

#### How Do You Find a Scale Factor in Similar Figures?

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...

Lesson Planet

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

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...

Lesson Planet

#### Common Angle Measures

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

#### Transformations

In this transformations worksheet, 10th graders solve and complete 27 various types of problems that include similar figures and justifying answers. First, they dilate the shape shown using a zoom factor from the origin. Then, students...

Lesson Planet

#### How Do You Find a Scale Factor in Similar Figures?

Lesson Planet

#### Spotting Polygons

See all sides of the story with a worksheet on geometric shapes! After studying the example at the top, which matches polygons with solid figures, second graders circle shapes that are named in the directions. Next, they match polygons...

Lesson Planet

#### Triangles

If you're about to begin a unit on the different types of triangles, this would be a good presentation for you to employ.Viewers are exposed to the three main types of triangles: congruent, isosceles, and equilateral. They are coached on...

Lesson Planet

#### Evergreen Tree

Learners use a ruler to make measurements, and to create triangles and a rectangle. They take the shapes they've made and assemble them into an evergreen tree image. This simple, yet effective, lesson would be ideal for young learners...

Lesson Planet

#### Same Shape and Size

Can your kindergartners recognize shapes? What about when they are in different orientations? Youngsters study groups of shapes to determine which have the same shape and size. Two of the groups have triangles and ovals, and the other...

Lesson Planet

#### Worksheet 7: Slope and Tangents

Providing both review and practice problems, this worksheet prompts students to answer five questions having to do with slope, tangents lines, graphing, the Squeeze Theorem, differentiable functions and derivatives. This activity could...

Lesson Planet

#### Identifying a Triangle by its Sides and Angles

Identify triangles by their angle measures and side lengths by looking at and measuring angle measures and side lengths. Use Cabri Jr. to construct various triangles, then manipulate the construction to create the 6 types of triangles,...

Lesson Planet

#### Triangles

Why are there so many different types of triangles? Be that as it may, beginning geometers need to understand the differences between equilateral, isosceles, scalene, and right triangles, and they get a visual approach with this...

Lesson Planet

#### Geometry - Angles Overview

Learners address 14 questions that include naming all pairs of opposite and supplementary angles for sets of intersecting lines and then, finding the measure of the unknown angle. They determine the measure of the angle that is...

Lesson Planet

#### Exploring Geometric Figures

Tenth graders explore mathematics by participating in hands-on daily activities. Learners identify a list of different shapes and classify them by shape, size, sides and vertices. They utilize tangrams and geometric pieces to gain an...