Answer:

Explanation:
The area of a square can be found using the following formula.

We know the area of the patio is 135 square feet. Substitute 135 ft² in for A.

We want to find the side length. We must isolate the variable,
. on one side of the equation.
s is being squared. The inverse of a square is a square root. Take the square root of both sides of the equation.



Round to the nearest tenth. The 1 in the hundredth place tells us to leave the 6 in the tenth place.

Each side of the patio is about 11.6 feet.