Find The Sum Of The Measures Of The Interior Angles Of Each Convex Polygon 11-gon. N - 2 180. In this video I do three examples.
The sum of all of the interior angles can be found using the formula S n 2180. For the nonagon shown find the unknown angle measure x. N - 2 180.
It is also possible to calculate the measure of each angle if the polygon is regular by dividing the sum by.
Use the value of x to find the measure of each angle. Use the Polygon Interior Angles Sum Theorem to find the sum of its interior angle measures. The sum of the measures of the interior angles of 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. To find the sum of interior angles of a polygon use the given formula.