Question

Find area of the regular pentagon with a side length of 10cm round to nearest tenth.

Answer 1

172 cm^2

Explanation:

tan 72/2 = 0.7265

0.7265 = 0.5(10)/h

h = 6.88

6.88 x 10 x 0.5 = 34.4

34.4 x 5 = 172 cm^2

Answer 2

172.1

Explanation:

172.05 rounded to the tenths place is 172.1