If the perimeter of a square is 36 cm, what is the length of one side?

If the perimeter of a square is 36 cm, what is the length of one side?

• A. 8 cm
• B. 9 cm
• C. 10 cm
• D. 12 cm

Answer: (B)

To find the length of one side of a square when the perimeter is known, you can use the formula for the perimeter of a square. The perimeter \( P \) of a square is calculated as \( P = 4s \), where \( s \) is the length of one side. In this case, you have the perimeter given as 36 cm. Setting up the equation based on the formula: \[ 4s = 36 \] To isolate \( s \), divide both sides of the equation by 4: \[ s = \frac{36}{4} \] Calculating this gives: \[ s = 9 \text{ cm} \] Thus, the length of one side of the square is indeed 9 cm, confirming that the correct answer is this option.

To find the length of one side of a square when the perimeter is known, you can use the formula for the perimeter of a square. The perimeter ( P ) of a square is calculated as ( P = 4s ), where ( s ) is the length of one side.

In this case, you have the perimeter given as 36 cm. Setting up the equation based on the formula:

[ 4s = 36 ]

To isolate ( s ), divide both sides of the equation by 4:

[ s = \frac{36}{4} ]

Calculating this gives:

[ s = 9 \text{ cm} ]

Thus, the length of one side of the square is indeed 9 cm, confirming that the correct answer is this option.