How are angles and sides related? Given several regular convex polygons, the video shows how to calculate the sum of their interior angles. The segment in a playlist on geometry shows how to find the measure of one angle if the polygon is regular.

Concepts

polygons, convex, regular polygons, angles, angle measurement, interior angles

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Additional Tags

math

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Instructional Ideas

• Demonstrate how the formula holds by showing the number of triangles formed in a polygon
• Lead a discussion on whether the formulas in the video will work for any polygon

Classroom Considerations

• Individuals should be comfortable solving linear equations

• This video is hosted on YouTube

Pros

• Contains a link to other interior angle resources
• Works a few examples using sums of interior angles

Cons

• None