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8 August, 10:22

The area of a square piece of cardboard is 81 in.² what is the length of the cardboard

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  1. 8 August, 10:35
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    81 inches squared=9 inches in length because the height equals 9 and with equals 9 multiply 9x9=81 so the length of the cardboard is 9 inches
  2. 8 August, 10:48
    0
    The area of a square is length x width, as 81 is a square number we know that 9 x 9 is 81 meaning the length is 9
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