For a complete lesson on area of a square, go to http://www.yourteacher.com - 1000+ online math lessons featuring a personal math teacher inside every lesson! In this lesson, students learn that the area of a figure is the measure of how much surface is covered by the figure. The formula for the area of a rectangle is length times width, so the area of a rectangle that has a length of 7 centimeters and a width of 3 centimeters is 7 times 3, or 21 square centimeters. The formula for the area of a square is side squared, so the area of a square that has a side of length of 9 feet is 9 squared, or 81 square feet.
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