Answer :
area of a square = side^2
to find the length of a side using area find the square root of the area
sqrt(625) = 25
so the easel has to be at least 25 inches
If the area of the paper is 625 sq in, the length of one side of this square is sqrt(625 sq in), or 25 inches. That's the min. side length of an easel that is to support the whole sheet of paper along its lowest side.
