Algebra -> Polygons -> SOLUTION: Each exterior angle is 100º less than its interior angle of ...180-x = measure of the corresponding exterior angle in degrees. At each vertex, there is an interior angle of the polygon. ... The sum of the angles in those triangles (180+180=360) is the same as the sum ... If a regular polygon has x sides, then the degree measureof each exterior angle is 360 divided by x.
