How is the perimeter of a rectangle calculated?

The perimeter of a rectangle is calculated by adding together the lengths of all four sides of the rectangle. Since a rectangle has two lengths and two widths, the formula for the perimeter is derived by summing these lengths:

Perimeter = Length + Length + Width + Width, which can be simplified to Perimeter = 2(Length + Width).

Thus, this formula captures all sides of the rectangle effectively. It accounts for both pairs of equal sides in the rectangle, resulting in the calculation of the total distance around the shape.

This method of multiplication by two is efficient and often preferred in mathematical applications, as it provides a straightforward formula that quickly yields the perimeter without needing to sum each side individually.