+566 Through how many different positive angles less than 360 degrees is it possible to rotate a regular icosagon (20-gon) clockwise about its center such that its image coincides with the original icosagon?
+36916 interior angles = (n-2)(180) = 3240 total Each is 162 exterior angle is 18
360 /18 = 20
Short of it 20 different angles
