If an area to be fenced measures 30 feet on each of the four sides, what is the total length of fencing required?

If an area to be fenced measures 30 feet on each of the four sides, what is the total length of fencing required?

• A. 90 ft
• B. 120 ft
• C. 200 ft
• D. 300 ft

Answer: (B)

Fencing around a shape uses its perimeter—the total distance around the outside. For a square, all four sides are the same length, so you add the side length four times. If each side is 30 feet, the total fencing needed is 4 × 30 = 120 feet. This accounts for all four sides of the square. The other numbers would correspond to fewer than four sides or a mismatch with four equal sides, so they don’t fit this scenario. The correct fencing length is 120 feet.

Fencing around a shape uses its perimeter—the total distance around the outside. For a square, all four sides are the same length, so you add the side length four times. If each side is 30 feet, the total fencing needed is 4 × 30 = 120 feet. This accounts for all four sides of the square. The other numbers would correspond to fewer than four sides or a mismatch with four equal sides, so they don’t fit this scenario. The correct fencing length is 120 feet.