Please complete each of the below examples to the best of your ability.
Use one of the following two strategies for determining the interior angle sum for a polygon:
1) Draw diagonals to create triangles, which have an interior angle sum of 180⁰. In the blue pentagon below, two diagonals create three triangles → 180 • 3 = 540⁰ interior angle sum
2) Use the formula method >>> (n − 2) • 180, where n = the number of the sides. The blue quadrilateral below has four sides. Substitute 4 in for n → (4 − 2) • 180 = 360⁰ interior angle sum
You can also use your notes and/or the following videos for assistance as needed.
