####
Now... gain access to over
**2 Million**
curated educational videos and
**500,000**
educator reviews to free & open educational resources

### We found 38 resources with the concept triangle classification

Videos (Over 2 Million Educational Videos Available)

3:42

The Secret World of Animal Sleep 101...

4:18

Thomas Jefferson - Author of The...

2:54

Phonics Song 2 (new version)

Other Resource Types ( 38 )

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

#### Colorful Triangles

Learners examine a figure made up of different types of triangles and then determine whether each triangle is right, acute, or obtuse. Next, they color each type of triangle a different color. Finally, pupils answer three fill in the...

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

#### 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

#### Isosceles Triangles: Lesson

Two sides give us two angles. A segment of a playlist on basic geometry revisits isosceles triangles. The presentation explains several properties and theorems related to isosceles triangles.

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

#### Discovering Triangle Sum

Math is everywhere, even in bikes! Groups investigate the sum of the angles of a triangles with two method—measurements and transformations. Using diagrams of bicycles, classmates find the types of triangles formed by the seat and axles....

Lesson Planet

#### The Third Side of a Triangle

How many different triangles can you create if you know two side lengths? Scholars consider this question as they determine the possible side lengths of the third side. They must justify their final answers.

Lesson Planet

#### Name That Triangle

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...

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

#### Triangle Pack

With so many different types of triangles, it can be a challenge for young mathematicians to keep them all straight. Luckily this set of printable triangles is here to engage children in comparing and sorting triangles by their...

Lesson Planet

#### The Land of Venn - Geometric Defense

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.

Lesson Planet

#### Accelerated Geometry Review Sheet

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;...

Lesson Planet

#### Geometry: Shapes and Solids

An excellent resource for a geometry class, as well as for an electrical engineering course. A thorough reference sheet covers geometric shapes such as triangles, parallelograms, and circles, as well as 3-D shapes and the Pythagorean...

Lesson Planet

#### Classifying Angles

Don't be obtuse, this geometry unit is the just the right resource for educating the acute young minds in your class. From classifying and measuring angles, to determining the congruence of shapes, this resource covers a wide range of...

Lesson Planet

#### Lines of Symmetry for Triangles

What can symmetry tell us about triangles? After looking at four examples, learners will come to realize that lines of symmetry are different for equilateral, isosceles, and scalene triangles. Use this guided practice activity as an...

Lesson Planet

#### Are These Right?

Is that a right triangle or a wrong triangle? Young mathematicians look at eleven different shapes and use a measuring tool of their choice to determine which triangles have right angles. Consider cutting out sets of the shapes to...

Lesson Planet

#### The Pythagorean Theorem and Classifying Triangles

Through the examination of the relationship between the lengths of the sides of a triangles students will learn the classification of triangles (acute, right, or obtuse).

Lesson Planet

#### Tri, Tri, Tri-angles

Elementary schoolers locate examples of acute, obtuse, or right triangles. They take pictures of the triangle examples with digital cameras, and compare the attributes of the three types of triangles.

Lesson Planet

#### Triangle Designs - Enrichment 16.5

Upper graders cut out cards with the scalene, isosceles, equilateral, acute, obtuse, and right triangle terms, choose a card, and complete the chart with the number of sides or angle and draw the design. They complete one chart.

Lesson Planet

#### Classify Triangles - Homework 15.3

Elementary schoolers identify triangles as equilateral, scalene, isosceles, or right. Seven triangles are depicted for them, followed by two word problems. This would serve best as a homework or an assessment.

Lesson Planet

#### Triangles and Angle Sums - Homework 14.5

Upper elementary and middle school learners solve four problems where they are given two angle measurements in a triangle and must calculate the measurement of the third angle. They are given a diagram and find the measurement of six...

Lesson Planet

#### Tangling with Triangles

Fourth and fifth graders explore triangles. In this triangles lesson, learners discover how to classify triangles according to their sides and measurements. They construct models of acute, right, and obtuse triangles.

Lesson Planet

#### Toothpick Triangles

Students draw a chart (included in the activity) to use with their investigation. They review terminology of triangles and receive toothpicks to use in the activity. Beginning with three toothpicks, students form a triangle. They...