Answer:
Step-by-step explanation:
The sum of angles in a regular octagon is 360 degree
to calculate the interior angles we divide 360 by the number of sides ( for a regular octagon it is 8)
360/8 = 45°
for the exterior angles, each exterior angle is supplementary to the interior angle at the vertex of the polygon, which means it is 180 -45 = 135°
