Interior Angle Sums in Polygons
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Last updated almost 4 years ago
11 questions
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.
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