Question

A square deck has an area of 81 square feet? How long is each side of the deck?

Answer 1

All 4 sides of a square are of the same length.

The formula for the area of a square is s*s = area where s is the length of one side of the square.

s^2 = 81

s = 9 or -9

-9 does not apply here but 9 does.

 Each side of the square deck is 9 feet long.

Answer 2

Formula for area of a square A=s^2 81=s^2 square root of 81 is 9 all the sides are the same 9 ft hope this helps