Find the length of the side of the square having area 784 sq.cm

Given: Area  of square 784 sq cm

To do: Find the length of side of square

Solution:

Area of the square with side $'a'$ is  $a^2$    

$a^2$ =  784$

$a  =   √784$

$ a    =   28$                    [sqrt of 784 is 28]

So, the side of the square is 28cm