Find The Measure Of One Exterior Angle Of A Regular Polygon That Has 21 Sides. Measure of a Single Interior Angle. Therefore the exterior angle is X 4.
171 approximately To find the interior angle subtract the exterior angle from 180 OR use the formula. What is the formula for polygon. Since the sum of exterior angles is 360 degrees and each one measures 120 degrees we have Number of angles 360120 3.
Find the number of sides of the polygon and its total number of diagonals.
A direct formula for the interior angle. A regular polygon has an exterior angle measure of x3 degrees and an interior angle measure of 13x - 33 degrees of sides polygon. The sum of the exterior angles of a regular polygon will always equal 360 degrees. 120 degrees is the measure of the exterior angle.