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Since a square has four sides of equal length, then each side of the square is 20/4 or 5 cm long. To find area, multiply length times width. Since length and width are the same in a square, multiply 5 times 5 to get 25 square cm. Remember area is always square units. The formula for area of a square is A = S2 where S is a side length.

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Q: The perimeter of a square is 20 cm What is the area of the same square?
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