Question

Suppose a squad patio has an area of 441 square feet. Use the formula for the area of a square to find the length of each side of the patio.

Answer 1

For a square: $A=s^{2}$

Solve for the length of a side by taking the square root of both sides:
$\sqrt{A}=\sqrt{s^{2}}$
$\sqrt{A}=s$

Now we can substitute known values:
$s=\sqrt{A}$
$s=\sqrt{441ft^{2}}$
$s=21ft$