Question

The area of a square is 36 square feet. If each side is lengthened by 4 feet, how could the perimeter of the new square be calculated?

A.
Divide 36 by 4 to get 9. Then add 4 to 9 to get 13 and multiply this by 4 to get the new perimeter.

B.
Divide 36 by 4 to get 9. Then add 4 to 9 to get 13 and multiply this by 13 to get the new perimeter.

C.
An area of 36 means the original square was 6 feet long on a side. Add 4 to 6 to get 10. Then multiply by 4 to get the new perimeter.

D.
An area of 36 means the original square was 6 feet long on a side. So its perimeter was 24 feet. Add 4 feet to this to get the new perimeter.

Answer 1

Answer: C.

The initial area of the square was 36 feet, which means that each side was 6 feet. If each side is lengthened by 4 feet, you have to add 4 feet to each side to get the length of 10 feet, and then multiply each side by 4 to get the perimeter of the new square. (4s) equals perimeter of a square. (s= length of each side)