1.证明:如果四边形两条对角线垂直且相等,那么依次连接它的四边中点得到一个正方形.2.已知:△ABC的两条高为BE,CF,点M为BC的中点.求证:ME=MF.谢了·····
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/11 08:57:31
![1.证明:如果四边形两条对角线垂直且相等,那么依次连接它的四边中点得到一个正方形.2.已知:△ABC的两条高为BE,CF,点M为BC的中点.求证:ME=MF.谢了·····](/uploads/image/z/1273233-57-3.jpg?t=1.%E8%AF%81%E6%98%8E%EF%BC%9A%E5%A6%82%E6%9E%9C%E5%9B%9B%E8%BE%B9%E5%BD%A2%E4%B8%A4%E6%9D%A1%E5%AF%B9%E8%A7%92%E7%BA%BF%E5%9E%82%E7%9B%B4%E4%B8%94%E7%9B%B8%E7%AD%89%2C%E9%82%A3%E4%B9%88%E4%BE%9D%E6%AC%A1%E8%BF%9E%E6%8E%A5%E5%AE%83%E7%9A%84%E5%9B%9B%E8%BE%B9%E4%B8%AD%E7%82%B9%E5%BE%97%E5%88%B0%E4%B8%80%E4%B8%AA%E6%AD%A3%E6%96%B9%E5%BD%A2.2.%E5%B7%B2%E7%9F%A5%EF%BC%9A%E2%96%B3ABC%E7%9A%84%E4%B8%A4%E6%9D%A1%E9%AB%98%E4%B8%BABE%2CCF%2C%E7%82%B9M%E4%B8%BABC%E7%9A%84%E4%B8%AD%E7%82%B9.%E6%B1%82%E8%AF%81%EF%BC%9AME%3DMF.%E8%B0%A2%E4%BA%86%C2%B7%C2%B7%C2%B7%C2%B7%C2%B7)
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