Area and Perimeter of a Rectangle

The area of a rectangle is found by the formula A=lw, where A is the area of the rectangle, l is the length (usually considered to be the longer side) and w is the width (usually considered to be the shorter side). The numbers for l and w are interchangeable. The perimeter of a rectangle is found by the formula P=2l+2w or P=2(l+w), where l is the length, and w is the width. It may be easier to add the length and width first and then double the result, as in the second formula.


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Last updated: 02/19/2018
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