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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.

26 Views 16 Downloads
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
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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
Math
2 more...
Resource Type
Instructional Videos
Media Length
5:58
Audience
For Teacher Use
Instructional Strategy
Flipped Classroom
Usage Permissions
Fine Print