Question

If the area and perimeter of a square are equal then its side is

Answer 1

So,
Let x be the side and
y be the area and perimeter

x*x=y(Area of square= side × side)

and

4*x=y(Perimeter of square = 4 × side)

x*x=4*x
x*x/x=4
x=4

Hope I made it simple and clear.

Answer 2

Hii friend... Your answer
Perimeter of square =area of square
4*s=s*s
4=s