Question

A regular pentagon has all sides equal and all central angles equal. Calculate, to the nearest tenth, the area of the pentagon shown.

Answer 1

area of a regular polygon = \(\bf \cfrac{1}{2}nR^2 \times sin\left(\cfrac{360}{n}\right)\)

n = number of sides
R = radius of circumcircle, in this case 5cm

Answer 2

thanks! can you check my answer?