| The Pythagorean Theorem(一) |
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| 引用本文： | 刘晓玫.The Pythagorean Theorem(一)[J].中学生数学,2002(4). |
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| 作者姓名： | 刘晓玫 |
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| 摘 要： | From the area of a square you can determine the length ofany of its sides.If the length of the side is √A.That is why√A is called the square root of A. Just as a plant rests on itsroots,a square can rest on its(positive)square root.side=√AThus if the area of a square is 400 square feet,its side has length 20cm.If the area is 13square feet,its side has length √13 feet,You can verify the latter of these with a calculator:
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