Answer:
9 ft
Step-by-step explanation:
The equation for area of a square is:
[tex]A=s^2[/tex]
Where s represents the length of the side.
We can substitute 81 square feet for the area to solve for s...
[tex]81ft^2=s^2[/tex]
Take the square root of both sides:
[tex]\sqrt{81ft^2}=\sqrt{s^2}[/tex]
[tex]9ft=s[/tex]
Therefore the length of each side is 9 ft.
