Area of a Square | MathHelp.com

This lesson covers the area of a square. 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.