Final answer:
Each exterior angle of a regular octagon measures 45 degrees.
Step-by-step explanation:
A regular octagon has 8 sides of equal length and 8 angles of equal size. To find the measure of each exterior angle of a regular octagon, we can use the formula:
measure of each exterior angle = 360° divided by the number of sides
Therefore, in the case of an octagon, each exterior angle measures:
measure of each exterior angle = 360° / 8 = 45°
So, the correct answer is (A) 45 degrees.