The area of a square tray is 81 square inches.
Find the length of a side of the tray.
The length of a side of the tray is 9 inches.
To find this, we need to take the square root of the area of the tray.
√81 = 9
Find the perimeter of the composite figure.
3cm 3cm 8cm 7cm
Perimeter =
21cm
To find the perimeter of the composite figure, we add up the lengths of all the sides.
3cm + 3cm + 8cm + 7cm = 21cm
To find the length of a side of the tray, you need to take the square root of the area. The formula to find the area of a square is side length multiplied by side length (A = s^2).
In this case, you are given that the area is 81 square inches. So, you can set up the equation:
81 = s^2
To solve for s (the length of a side), you need to take the square root of both sides of the equation. Taking the square root of a number cancels out the squaring operation, leaving you with the original number.
√(81) = √(s^2)
The square root of 81 is 9, so the equation becomes:
9 = s
Therefore, the length of a side of the tray is 9 inches.