What is the formula for calculating the perimeter of a rectangle?

The perimeter of a rectangle is calculated by adding the lengths of all four sides. Since a rectangle has two lengths and two widths, the formula to find the perimeter is derived by summing these sides: (2 \times \text{length} + 2 \times \text{width}). This can be simplified to (2(\text{length} + \text{width})).

Thus, the correct formulation involves multiplying the sum of the length and width by 2, which is exactly what option C states: Perimeter = 2(length + width). This reflects the total distance around the rectangle, which is essential for geometric calculations involving perimeter.