Q:

# What is the perimeter of a square if it has an area of 36 square centimeters?

A:

As shown at Math Open Reference, the perimeter of a square with an area of 36 square centimeters is 24 centimeters. This can be calculated using the method for calculating a square's area in reverse.

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The area of a rectangle is length times width. Since a square's length is equal to its width, a square's area is equal to the length of one side times itself. So, reversed, the square root of the square's area gives the length of one side. In this case, the square root of 36 square centimeters is 6 centimeters. Again, since all four sides of a square are the same, its perimeter is equal to the length of one side times four. For a square with one side equal to 6 centimeters, the perimeter equals 24 centimeters.

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