Question

Find the area of square whose perimeter is $84cm.$

Answer 1

Step 1: Side of square

Given,

Perimeter of square $=$$84cm$

$\begin{array}{rcl}4\times side& =& 84cm\\ side& =& \frac{84}{4}cm\\ side& =& 21cm\end{array}$

Step 2: Area of square

Area of the square $=$${\left(side\right)}^2=side\times side$

$$\begin{gathered} ={\left(21\right)}^2=21\times 21 \\ =441c{m}^2 \end{gathered}$$

Thus, Area of the square is $441c{m}^2$.