Final answer:
The side length of the square should be approximately 8.124 inches.
Step-by-step explanation:
To find the length of the sides of the square, we need to find the square root of the area.
The area of the square is given as 66 square inches.
Taking the square root of 66, we find that the side length of the square should be approximately 8.124 inches (rounded to three decimal places).