Instructional Video

Math Mammoth: Angles in a Triangle Add Up to 180 Degrees: Exercises and Proof

Curated by ACT

Demonstrates how to solve problems where one angle of a triangle is unknown and how to draw an isosceles triangle with the given properties. This is followed by a proof of the angle-sum theorem. [9:18]

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CCSS: Adaptable
Additional Tags
angle problems, find unknown angle, angle-sum theorem, math mammoth: angles in a triangle add up to 180 degrees: exercises and proof
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Classroom Considerations
  • Knovation Readability Score: 2 (1 low difficulty, 5 high difficulty)
  • The intended use for this resource is Instructional
  • This video is hosted on YouTube
Common Core
7.G.B.5