SOLUTION: the diagonal of a square is 56 centimeters long. find the perimeter of the quare to the nearest tenth.

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Question 368053: the diagonal of a square is 56 centimeters long. find the perimeter of the quare to the nearest tenth.
Answer by robertb(5830) About Me  (Show Source):
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let s = side of the square. Then s%5E2%2Bs%5E2+=+56%5E2+=+3136, or
2s%5E2+=+3136, or s%5E2+=+1568, or s = 39.6 cm, to the nearest tenth.