The area of a square tray is 81 square inches.
Find the length of the tray.
= inches
Find the perimeter of the tray
= inches
The length of the tray is 9 inches (since the area of a square is side length squared, and √81 = 9).
To find the perimeter of the tray, we can use the formula P = 4s, where P is the perimeter and s is the side length of the square. So P = 4(9) = 36 inches.