Question

Calculate the area of the regular pentagon below:

A regular pentagon with side length of 11.8 inches and dotted line from center to middle of side of 8.1 inches.

Answer 1

Answer: 238.95 in²

because this is a regular pentagon

=> the area of the regular pentagon will be 5 times the area of the triangle in the picture.

we have: the area of the triangle is: (11,8.8,1)/2 = 47,79 (in²)

=> the area of the regular pentagon is 5. 47,79 = 238,95 (in²)

Explanation: