A rectangle has a length of 12 cm and a width of 5 cm. What is its perimeter?

• A. 34 cm
• B. 40 cm
• C. 28 cm
• D. 25 cm

Answer: (C)

To find the perimeter of a rectangle, you use the formula:

[ \text{Perimeter} = 2 \times (\text{Length} + \text{Width}) ]

In this case, the length of the rectangle is 12 cm and the width is 5 cm. Plugging these values into the formula:

[ \text{Perimeter} = 2 \times (12 , \text{cm} + 5 , \text{cm}) ]

First, calculate the sum of the length and the width:

[ 12 , \text{cm} + 5 , \text{cm} = 17 , \text{cm} ]

Now, multiply this sum by 2:

[ \text{Perimeter} = 2 \times 17 , \text{cm} = 34 , \text{cm} ]

Thus, the perimeter of the rectangle is 34 cm. This demonstrates the application of the formula in calculating the perimeter based on the given dimensions of the rectangle.