Question

Find the perimeter of a square whose area is $196{\text{cm}}^2$.

Answer 1

Area of square, $A$ of side $a$ is given by:

$A=a^2$

$a^2=196{\text{cm}}^2$ (Given)

$a=\sqrt{196}\text{cm}$

$a=14\text{cm}$

Perimeter of square $P$ of side $a$ is given by:

$P=4a$

$P=4\times 14\text{cm}$

$P=56\text{cm}$

Hence, the perimeter is $56\text{cm}$.