By which angle measures can the regular octagon be rotated so it maps onto itself? select each correct answer. 45° 60° 90° 135° 180° 240°

For a regularly shaped object, the rotation which can it have so that it will still map on itself can be calculated using the formula:

angle of rotation = 360° / n

where n is the number of sides, in this case n = 8, therefore:

angle of rotation = 360° / 8 = 45°