三道有关勾股定理题(急!1.在△ABC中,若a=根号三,b=3,c=二倍根号三,则∠A=2.在△ABC中,三边a,b,c满足a^2+b^2=25,a^2-b^2=7,又c=5,则最大边上的高为3.(此题需完整过程)在△ABC中,BE,AD,CF分别是AC,BC,AB边
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![三道有关勾股定理题(急!1.在△ABC中,若a=根号三,b=3,c=二倍根号三,则∠A=2.在△ABC中,三边a,b,c满足a^2+b^2=25,a^2-b^2=7,又c=5,则最大边上的高为3.(此题需完整过程)在△ABC中,BE,AD,CF分别是AC,BC,AB边](/uploads/image/z/8675493-69-3.jpg?t=%E4%B8%89%E9%81%93%E6%9C%89%E5%85%B3%E5%8B%BE%E8%82%A1%E5%AE%9A%E7%90%86%E9%A2%98%EF%BC%88%E6%80%A5%211.%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2C%E8%8B%A5a%3D%E6%A0%B9%E5%8F%B7%E4%B8%89%2Cb%3D3%2Cc%3D%E4%BA%8C%E5%80%8D%E6%A0%B9%E5%8F%B7%E4%B8%89%2C%E5%88%99%E2%88%A0A%3D2.%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2C%E4%B8%89%E8%BE%B9a%2Cb%2Cc%E6%BB%A1%E8%B6%B3a%5E2%2Bb%5E2%3D25%2Ca%5E2-b%5E2%3D7%2C%E5%8F%88c%3D5%2C%E5%88%99%E6%9C%80%E5%A4%A7%E8%BE%B9%E4%B8%8A%E7%9A%84%E9%AB%98%E4%B8%BA3.%EF%BC%88%E6%AD%A4%E9%A2%98%E9%9C%80%E5%AE%8C%E6%95%B4%E8%BF%87%E7%A8%8B%EF%BC%89%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2CBE%2CAD%2CCF%E5%88%86%E5%88%AB%E6%98%AFAC%2CBC%2CAB%E8%BE%B9)
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