ABCDEFGH is a regular octagon. The minimum degree of rotation by which this octagon can map onto itself is °. It will take increments of that degree of clockwise rotation for A′ (the image of A) to coincide with C.
The minimum degree of rotation is by wich this octagon can map onto itself is 45° . It will take 2° increments of that degree of clockwise rotation for A´ to coincide with C
