Question

O is the center of the regular pentagon below. Find its perimeter. Round to the nearest tenth if necessary.

Answer 1

P= 29.389 ~ 29.4

Explanation:

P= ns = 2rn sin(180/n)...... formula to find perimeter

p= 2(5)(5)sin(36)

p= 2(5)(5)sin(36)P= 50 ×0.5877

p= 2(5)(5)sin(36)P= 50 ×0.5877 P= 29.389 approximate to 29.4