If the area of a square room is 36 m2, what is the length of each side?

36 it wouldnt change the only thing that would is the hight and the volume 

Well, if you want to know the side length of a square, just remember the equation for the area of a square is A = s², so if the area is 36, then you just plug it in:

36 = s² ⇒ √36 = √s² ⇒ 6 = s 

Your side length is 6 meters.