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we all know that the square has 4 equal sides and u said that its perimeter is 40 cm then the length of each of its sides is 40\4=10 and the area of a square is stimess which is side times side then its area is 10 TIMES 10=100CM^2 THAT S IT SO SIMPLE ZEINAB SLEIMAN Lebanon BEIRUT GRADE 8 ALBATOUL HIGH SCHOOL TUESDAY:3-3-09

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14y ago
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NORA HANY SOLIMAN AB...

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2y ago
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Anonymous

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3y ago

so we all know that a square has 4 sides and the perimeter is 40cm so that must mean that each side is worth 10cm but area is where you times all the numbers on the side so you would do 10x10 which would equal to 100cm so there's your answer

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Anonymous

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3y ago

100cm

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Q: The perimeter of a square is 40cm what is its area?
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