八年级、勾股定理1.求证:m²-n²,m²+n²,2mn(m>n,m,n是正整数)是一组勾股数.2.已知:在△ABC中,三条边长分别为a,b,c=n²-1,b=2n,c=n²+1(n>1).试判断△ABC的形状.3.等腰三角形
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![八年级、勾股定理1.求证:m²-n²,m²+n²,2mn(m>n,m,n是正整数)是一组勾股数.2.已知:在△ABC中,三条边长分别为a,b,c=n²-1,b=2n,c=n²+1(n>1).试判断△ABC的形状.3.等腰三角形](/uploads/image/z/7139498-50-8.jpg?t=%E5%85%AB%E5%B9%B4%E7%BA%A7%E3%80%81%E5%8B%BE%E8%82%A1%E5%AE%9A%E7%90%861.%E6%B1%82%E8%AF%81%3Am%26%23178%3B%EF%BC%8Dn%26%23178%3B%2Cm%26%23178%3B%2Bn%26%23178%3B%2C2mn%EF%BC%88m%EF%BC%9En%2Cm%2Cn%E6%98%AF%E6%AD%A3%E6%95%B4%E6%95%B0%EF%BC%89%E6%98%AF%E4%B8%80%E7%BB%84%E5%8B%BE%E8%82%A1%E6%95%B0.2.%E5%B7%B2%E7%9F%A5%EF%BC%9A%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2C%E4%B8%89%E6%9D%A1%E8%BE%B9%E9%95%BF%E5%88%86%E5%88%AB%E4%B8%BAa%2Cb%2Cc%3Dn%26%23178%3B%EF%BC%8D1%2Cb%3D2n%2Cc%3Dn%26%23178%3B%2B1%EF%BC%88n%EF%BC%9E1%EF%BC%89.%E8%AF%95%E5%88%A4%E6%96%AD%E2%96%B3ABC%E7%9A%84%E5%BD%A2%E7%8A%B6.3.%E7%AD%89%E8%85%B0%E4%B8%89%E8%A7%92%E5%BD%A2)
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