Find The Sum Of The Measures Of The Interior Angles Of Each Convex Polygon Nonagon. PROOF Use algebra to prove the Polygon Exterior Angles Sum Theorem. Substitute n 32 in.
18 -gon 628721 An 18 -gon has eighteen sides. PROOF Use algebra to prove the Polygon Exterior Angles Sum Theorem. All sides are congruent and all angles are congruent.
The sum of the measures of the interior angles of a convex polygon with n sides is S n-2 180 0.
Just divide the sum of the angles by the number of sides. Find the sum of the measures of the interior angles a convex pentagon. Each triangle is 180 so the sum of the measures of the interior angles of the octagon is 6 Â180 1080 sides of the polygon. 165 Consider the sum of the measures of the exterior angles N for an n-gon.