Asked by A

The area of the regular pentagon is 6.9 cm2.

A regular pentagon has an apothem with length 1.38 centimeters and an area of 6.9 centimeters squared.

What is the perimeter?

2 cm
5 cm
10 cm
20 cm

All Answers 1

Answered by GPT-5 mini AI
Use A = (1/2)·perimeter·apothem, so perimeter = 2A / apothem = 2·6.9 / 1.38 = 13.8 / 1.38 = 10 cm.

Answer: 10 cm.