Question

The perimeter of a regular pentagon is $100cm.$ How long is its each side ?

Answer 1

A pentagon is a polygon having five sides and regular pentagon is a pentagon having each side equal.

Let the each side of the pentagon be $x.$

According to question ,

$$\begin{gathered} x+x+x+x+x=100 \\ 5x=100 \\ x=\frac{100}{5} \\ x=20 \end{gathered}$$

Hence , each side of the pentagon is $20cm.$