Question

Find the perimeter and area of each of the squares whose sides are

$21cm$

Answer 1

Sides of square $=21cm$

Perimeter of square $=4\times side$

$$\begin{gathered} =4\times 21 \\ =84 \end{gathered}$$

So, the perimeter is $84cm$

Area of square $=side\times side$

$$\begin{gathered} =21\times 21 \\ =441 \end{gathered}$$

Hence, the area of square is $441m^2$.