Answer:
below
Explanation:
The INTERIOR angles of a n-gon sum to ( n-2)(180)
for an octogon (8-2)(180) = 1080 °
so each INTERIOR angle = 1080 / 8 = 135°
Exterior angles are supplementary to this 135 + x = 180 x = 45°
Another easier way exterior angles sum to 360
360 / 8 = 45°