勾股定理 1.计算四边形ABCD(如图)的面积.2.一个三角形三边长的比为3:4:5,它的周长是60cm1.计算四边形ABCD(如图)的面积。2.一个三角形三边长的比为3:4:它的周长是60cm,求这个三角形的
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![勾股定理 1.计算四边形ABCD(如图)的面积.2.一个三角形三边长的比为3:4:5,它的周长是60cm1.计算四边形ABCD(如图)的面积。2.一个三角形三边长的比为3:4:它的周长是60cm,求这个三角形的](/uploads/image/z/2118930-42-0.jpg?t=%E5%8B%BE%E8%82%A1%E5%AE%9A%E7%90%86+1.%E8%AE%A1%E7%AE%97%E5%9B%9B%E8%BE%B9%E5%BD%A2ABCD%EF%BC%88%E5%A6%82%E5%9B%BE%EF%BC%89%E7%9A%84%E9%9D%A2%E7%A7%AF.2.%E4%B8%80%E4%B8%AA%E4%B8%89%E8%A7%92%E5%BD%A2%E4%B8%89%E8%BE%B9%E9%95%BF%E7%9A%84%E6%AF%94%E4%B8%BA3%EF%BC%9A4%EF%BC%9A5%2C%E5%AE%83%E7%9A%84%E5%91%A8%E9%95%BF%E6%98%AF60cm1.%E8%AE%A1%E7%AE%97%E5%9B%9B%E8%BE%B9%E5%BD%A2ABCD%EF%BC%88%E5%A6%82%E5%9B%BE%EF%BC%89%E7%9A%84%E9%9D%A2%E7%A7%AF%E3%80%822.%E4%B8%80%E4%B8%AA%E4%B8%89%E8%A7%92%E5%BD%A2%E4%B8%89%E8%BE%B9%E9%95%BF%E7%9A%84%E6%AF%94%E4%B8%BA3%EF%BC%9A4%EF%BC%9A%E5%AE%83%E7%9A%84%E5%91%A8%E9%95%BF%E6%98%AF60cm%2C%E6%B1%82%E8%BF%99%E4%B8%AA%E4%B8%89%E8%A7%92%E5%BD%A2%E7%9A%84)
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