Calculate the Perimeter of a Rectangle

Consider a polygon that has 4 sides. This shape is known as a quadrilateral. A quadrilateral can have different types based on its angles and sides. One common type of quadrilateral is a rectangle. A rectangle has opposite sides that are equal and all four angles are right angles (90 degrees).

If the lengths of the opposite sides of a rectangle are 5 cm and 7 cm, what is the perimeter of the rectangle?

The formula to calculate the perimeter $P$ of a rectangle with length $l$ and width $w$ is given by:

$$P = 2l + 2w$$