That is the equation for the perimeter of a rectangle. A rectangle is a quadrilateral with four sides (2 sets of parallel) and 4 right angles. The perimeter of a rectangle is twice the length, l, plus twice the width, w. It’s perimeter is the measure of the total length on the outside (the outline) of a shape. Perimeter of a rectangle is represented by: p=2l+2w where l is length and w is width ( and p is perimeter ). The equation can also be written like this: p=2(l + w).
For example, if one side of a rectangle is 3 inches and another side is 5 inches, we can substitute these values into the perimeter equation like this: p = 2(5) + 2(3)
p = 10 + 6
p = 16 inches.