Question

Perimeter of a regular pentagon is $20cm$.How long is its each side.

Answer 1

Finding the each side of regualr pentagon:

Given that, perimeter of the regular pentagon is $20cm$

We know that, the perimeter of the given regular pentagon $=5a$

$$\begin{gathered} \therefore 5a=20cm \\ \Rightarrow a=\frac{20}{5}cm \\ \Rightarrow a=4cm \end{gathered}$$

Hence, the each side of the given pentagon is equal to $4cm$