What is a Triangle? Instructional Video

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Instructional Video

What is a Triangle?

Curated and Reviewed by Lesson Planet

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 - three angles and three sides.

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Concepts

acute angles, angles, equilateral, isosceles triangles, triangles, number 3, obtuse angles, polygons, 2-d shapes, 2-d, right triangles, scalene, sides, triangle sum theorem, triangle properties, vertex

Additional Tags

triangle, right triangle, acute, obtuse, isosceles, scalene, vertex, three, sides, angles, 180 degrees, polygon, equilateral, triangle sum theorem, math

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Resource Details

Grade

1st - 5th

Subjects

2 more...

Resource Type

Instructional Videos

Media Length

5:58

Audience

For Teacher Use

Instructional Strategy

Flipped Classroom

Usage Permissions

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View 43,909 other resources for 1st - 5th Grade Math