公路上AB两点相距20km,CD表示两个村庄,DA垂直AB.DA=12km,CB=8km,现在要在公路AB边上建一个收购站E.使。使得CD两个村庄到E站的距离相等。E站应建在距离A点多少千米?
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![公路上AB两点相距20km,CD表示两个村庄,DA垂直AB.DA=12km,CB=8km,现在要在公路AB边上建一个收购站E.使。使得CD两个村庄到E站的距离相等。E站应建在距离A点多少千米?](/uploads/image/z/1598437-37-7.jpg?t=%E5%85%AC%E8%B7%AF%E4%B8%8AAB%E4%B8%A4%E7%82%B9%E7%9B%B8%E8%B7%9D20km%2CCD%E8%A1%A8%E7%A4%BA%E4%B8%A4%E4%B8%AA%E6%9D%91%E5%BA%84%2CDA%E5%9E%82%E7%9B%B4AB.DA%3D12km%2CCB%3D8km%2C%E7%8E%B0%E5%9C%A8%E8%A6%81%E5%9C%A8%E5%85%AC%E8%B7%AFAB%E8%BE%B9%E4%B8%8A%E5%BB%BA%E4%B8%80%E4%B8%AA%E6%94%B6%E8%B4%AD%E7%AB%99E.%E4%BD%BF%E3%80%82%E4%BD%BF%E5%BE%97CD%E4%B8%A4%E4%B8%AA%E6%9D%91%E5%BA%84%E5%88%B0E%E7%AB%99%E7%9A%84%E8%B7%9D%E7%A6%BB%E7%9B%B8%E7%AD%89%E3%80%82E%E7%AB%99%E5%BA%94%E5%BB%BA%E5%9C%A8%E8%B7%9D%E7%A6%BBA%E7%82%B9%E5%A4%9A%E5%B0%91%E5%8D%83%E7%B1%B3%EF%BC%9F)
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