Question

The area of regular pentagon is 125√3 cm², how long is its each side?

(a) 10 cm
(b) 15 cm
(c) 16 cm
(d) 18 cm​

Answer 1

Answer:

I think its 16

according to me......

Answer 2

Let the length of each side be a cm.

Hence,

$\frac{5 {a}^{2} }{4} \cot(36) = 125 \sqrt{3}$

From this we get a = 16 cm.