To find the perimeter of a rectangle, add the lengths of the rectangle's four sides. If you have only the width and the height, then you can easily find all four sides (two sides are each equal to the height and the other two sides are equal to the width). Multiply both the height and width by two and add the results.

Do you multiply when doing perimeter?

In general, to figure the perimeter of a polygon you just add up the length of the sides. The above two formulas are just short cuts where you can use multiplication because you know some of the sides are the same length.

Do you multiply perimeter and width?

Perimeter is a measure of the distance along the outside edge of the figure. We can find a figure's perimeter by combining its outside dimensions. For example, the perimeter of a rectangle is found by doubling the length, doubling the width, and then adding the two together.