Exploring Interior and Exterior Angles of Polygons

Cindy Walter, Oct 23, 2016


  • 1. Finding a rule for the sum of interior anlges
  • 2. Explore Interior Angles Sum
  • 3. Explore Exterior Angles Sum
  • 4. Regular Polygons

1.

Finding a rule for the sum of interior anlges

Move the slider to change the number of sides on the polygon - can you use this information to help you find a rule to work out the sum of interior angles in a polygon?
Finding a rule for the sum of interior anlges
What is the sum of interior angles for a triangle?[br][br]Can you see a relationship between the number of sides of a polygon and the amount of triangles that "fit" inside it?[br][br]How can this help you to work out the sum of interior angles for another polygon?[br][br]Can you find a rule to work out the sum of interior angles in any polygon?
– LS

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