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

The formula for calculating the perimeter of a rectangle is given by adding the lengths of all four sides together. A rectangle has two lengths (L) and two widths (W). Therefore, to find the perimeter, you calculate it as:

Perimeter = Length + Width + Length + Width, which can be simplified to:

Perimeter = 2L + 2W.

This formula tells us that you take the length, double it (since there are two lengths), take the width, and double that as well, and then add these two amounts together. This provides a comprehensive measure of the distance around the rectangle, incorporating both dimensions equally.

This understanding means that the correct choice accurately reflects the complete formula needed, which includes both dimensions multiplied by two.