The perimeter of a square with side length s is given by which expression?

• A. A = π r^2
• B. P = 4s
• C. P = 2l + 2w
• D. P = a + b + c

Answer: (B)

Perimeter is the total distance around a shape. For a square, all four sides have the same length, so adding them up gives s + s + s + s = 4s. That makes the perimeter expression P = 4s. The circle option uses πr^2, which is area, not perimeter. The rectangle perimeter is 2l + 2w, which would reduce to 4s only if both dimensions are equal to s, but the direct square formula with the side length is simply four times that length. The remaining option isn’t a standard perimeter expression.