Find The Sum Of The Measures Of The Interior Angles Of The Convex Polygon. A polygon with 18 sides has an interior angle sum of 2880 digrees. A810 b1080 c1620 d2880.
For the nonagon shown find the unknown angle measure x. Example 1 Determine the unknown angle measures. The sum of all of the interior angles can be found using the formula S n - 2180.
Measure of a Single Exterior Angle Formula to find 1 angle of a regular convex polygon of n.
Exterior Angles Sum of Polygons. N 9 -2180n 9 -2180 7180 1260. S n 2 180 This is the angle sum of interior angles of a polygon. Therefore the sum of the interior angles of the polygon is given by the formula.