Question

What is the approximate side length of each square

Answer 1

Answer: $9\ units$

Step-by-step explanation:

You need to use the following formula for calculate the area of a square:

$A=s^2$

Where "s" is the lenght of any side of the square.

You know that the area of a mural is $81\ units^2$. Then, you can substitute this area into the formula and solve for "s", in order to find the side lenght of the mural.

Therefore, this is:

$81\ units^2=s^2\\\\s=\sqrt{(81\ units^2)}\\\\s=9\ units$