Instructional Video

Polygon Angles

Curated and Reviewed by Lesson Planet

One's knowledge of angles should measure up to expectations. Scholars watch a video to learn about angles in polygons. They first see how to partition a polygon into triangles to find the sum of the interior angle measures. They then discover how to calculate the measure of an interior angle of a regular polygon as well as how to determine the measure of an exterior angle.

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Instructional Ideas
  • Apply the corrective assignments as homework
Classroom Considerations
  • This is the first of seven lessons in the Geometry - Quadrilaterals and Polygons unit
  • Assumes a basic understanding of lines and triangles 
  • This video is hosted on YouTube
Pros
  • Includes a packet for learners to complete
  • Provides a separate answer key for instructors
Cons
  • None