What is the average (arithmetic mean) of the measure of the five angles in a pentagon?

(A) 36  ͦ
(B) 72  ͦ
(C) 90  ͦ
(D) 180  ͦ

Answer: (B) 72  ͦ
The average (arithmetic mean) of the measure of the five angles in a pentagon is 72  ͦ.