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### We found 111 resources with the concept equilateral triangles

Videos (Over 2 Million Educational Videos Available)

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Women's History Activator: Eleanor Roosevelt

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Phonics Song 2 (new version)

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Ancient Egypt | What Everyday Life Was...

Other Resource Types
(111)

Lesson Planet

#### Math Antics Geometry Video Lessons

The point of this collection of 12 videos is to introduce learners to three basic parts of geometry—points, lines, and planes. The presenter provides definitions, shows how to classify shapes, provides examples, and shows how to use...

Lesson Planet

#### EngageNY Geometry Module 1: Congruence, Proof, and Constructions

The 36 lessons in the Geometry Module 1 collection address transformations in teaching geometry brought on by Common Core. The focus here is on transformations and the relationships between transformations and congruence. Teacher...

Lesson Planet

#### Study Jams! Classify Triangles

Jam on with this multi-faceted activity teaching triangle classification. Start with a learner-paced lesson describing the different qualities of triangles and follow with a fun karaoke session. Also provided are two types of...

Lesson Planet

#### SAT Prep: Test 4 Section 2 Part 5

Picking up where he left off (problem 17), Sal demonstrates graphing functions with an informative and clear explanation. Additionally, problem 18 involves finding the values of angles in an equilateral triangle.

Lesson Planet

#### Classifying Triangles Using Sides

For this geometry worksheet, students answer 8 fill in the blank questions where they must examine 5 different complex geometric figures to classify triangles.

Lesson Planet

#### SAT Prep: Test 1 Section 6 Part 5

Back with "more energy," Sal begins his explanation of problems 15-18 on page 412 of The Official SAT Study Guide. Problems include angles of equilateral triangles, rectangles, and graphing slopes.

Lesson Planet

#### Parallel Lines Cut by a Transversal

Use the parallel lines to find your way. After first reviewing geometric constructions and the relationships between angles formed by parallel lines and a transversal, young mathematicians write proofs for theorems relating to parallel...

Lesson Planet

#### Terrific Triangles

Scholars show what they know about types of triangles with a hands-on activity that challenges them to build models using toothpicks. Following a whole-class discussion and brief presentation, small groups gather to form shapes and...

Lesson Planet

#### Accessible Shapes

All the 2-D and 3-D measurement work you need is in one location. Divided into three sections, the geometry lesson plans consist of visualization of three dimensions, classifying geometric figures, and finding surface area and volume....

Lesson Planet

#### Hexagon Inscribed Within a Circle

Mark off the length of the radius around the circle. Using a compass, the presenter shows how to construct a regular hexagon in a circle. Pupils see how triangles formed in the hexagon are equilateral, allowing for the construction to...

Lesson Planet

#### Constructing Equilateral Triangles and 60 Degree Angles

Creating a 60-degree angle also creates an equilateral triangle. By watching the video, individuals learn the steps required to construct a 60-degree angle. The presentation shows that the process is the same for constructing an...

Lesson Planet

#### Isosceles Triangle Spaces

How many different types of triangles can your class name? A discovery lesson guides learners through an exploration of the different triangle types and the relationships between their angles and sides. Using coordinate geometry,...

Lesson Planet

#### Best Triangle

What makes an equilateral triangle equilateral? It turns out it's much more than just the side lengths! Learners analyze four different triangles to determine the best equilateral triangle. They create a formula that they later use to...

Lesson Planet

#### Equilateral Triangles: Lesson

Take a second look at triangles that are equal all the way around. The video reminds viewers what an equilateral triangle is and points out that the three angles are the same. Using the fact that equilateral triangles are also isosceles,...

Lesson Planet

#### What You Know About the Bermuda Triangle?

Get lost in the classifications. Using the backdrop of the Bermuda Triangle, pupils classify it by angle and side measures. They also learn information about the triangle and its history.

Lesson Planet

#### Classifying Triangles: Lesson

That's correct, it is right and scalene. The video introduces the two methods for classifying triangles, sides, and angles. A resource in the playlist for basic geometry provides the definitions for each of the classifications.

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

#### Construction Junction

A prescription for inscribing polygons makes for an interesting instructional activity. Individuals follow a set of written instructions to construct both an equilateral triangle and regular hexagon inscribed in a circle. An extra...

Lesson Planet

#### Triangles

What has three sides and is adorable? A-cute triangle. The resource introduces triangles and how to classify them by sides and angles or both. The video concludes with using the sum of the angles of a triangle to show how to solve for a...

Lesson Planet

#### Geometry: Constructions

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...

Lesson Planet

#### Equilateral Triangle in a Circle

I thought compasses could only draw circles! Scholars draw an equilateral triangle inscribed in a given circle. They accomplish this by using a compass and straightedge as the solution strategy.

Lesson Planet

#### Lyle's Triangles

Try five problems on triangles. Levels A and B focus on shapes that can be created from right triangles. Level C touches upon the relationship between the area of a six-pointed star and the area of each triangle of which it is composed....

Lesson Planet

#### How Many Triangles?

Something for young mathematicians to remember: the sum of any two sides must be greater than the third. Class members investigates the Triangle Inequality Theorem to find the relationship between the sides of a triangle. At the same...

Lesson Planet

#### Coordinates of Equilateral Triangles

Can it be constructed? The task poses the question whether it is possible to have an equilateral triangle with its vertices located at integer coordinates. Pupils work with their knowledge of trigonometric ratios and the Pythagorean...