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.

Concepts

polygons, angles, regular polygons, interior angles, exterior angles

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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