Which formula represents the perimeter of a rectangle?

To calculate the perimeter of a rectangle, you need to consider all four sides of the shape. The perimeter is defined as the total distance around the outside of the rectangle. A rectangle has two lengths and two widths.

The formula P = 2l + 2w accurately represents this concept as it adds together the lengths of both pairs of sides. Here, "l" represents the length of the rectangle and "w" represents its width. By doubling each—2l for the lengths and 2w for the widths—you account for all sides.

Other formulas in the options refer to different geometrical figures or calculations. The formula P = lw represents the area of a rectangle, not the perimeter. The formula P = 4s calculates the perimeter of a square, where s is the length of one side, and P = 2πr is the formula for the circumference of a circle, where r is the radius. Each of these serves a specific purpose distinct from finding the perimeter of a rectangle.