Question

Find the area of a regular pentagon with a side of 5cm round to nearest tenth

Answer 1

43 cm^2

Explanation:

tan 72/2 = 0.7265

0.7265 = 0.5(5)/h

h = 3.44

3.44 x 5 x 0.5 = 8.6

8.6 x 5 = 43 cm^2