如图四边形ABCD为一梯形纸片AB平行于CDAD=BC翻折纸片ABCD使点A与点C重合折痕为EF,CE垂直于AB (1)求证EF平如图四边形ABCD为一梯形纸片AB平行于CDAD=BC翻折纸片ABCD使点A与点C重合折痕为EF,CE垂直于AB(
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![如图四边形ABCD为一梯形纸片AB平行于CDAD=BC翻折纸片ABCD使点A与点C重合折痕为EF,CE垂直于AB (1)求证EF平如图四边形ABCD为一梯形纸片AB平行于CDAD=BC翻折纸片ABCD使点A与点C重合折痕为EF,CE垂直于AB(](/uploads/image/z/8914146-42-6.jpg?t=%E5%A6%82%E5%9B%BE%E5%9B%9B%E8%BE%B9%E5%BD%A2ABCD%E4%B8%BA%E4%B8%80%E6%A2%AF%E5%BD%A2%E7%BA%B8%E7%89%87AB%E5%B9%B3%E8%A1%8C%E4%BA%8ECDAD%3DBC%E7%BF%BB%E6%8A%98%E7%BA%B8%E7%89%87ABCD%E4%BD%BF%E7%82%B9A%E4%B8%8E%E7%82%B9C%E9%87%8D%E5%90%88%E6%8A%98%E7%97%95%E4%B8%BAEF%2CCE%E5%9E%82%E7%9B%B4%E4%BA%8EAB+%281%EF%BC%89%E6%B1%82%E8%AF%81EF%E5%B9%B3%E5%A6%82%E5%9B%BE%E5%9B%9B%E8%BE%B9%E5%BD%A2ABCD%E4%B8%BA%E4%B8%80%E6%A2%AF%E5%BD%A2%E7%BA%B8%E7%89%87AB%E5%B9%B3%E8%A1%8C%E4%BA%8ECDAD%3DBC%E7%BF%BB%E6%8A%98%E7%BA%B8%E7%89%87ABCD%E4%BD%BF%E7%82%B9A%E4%B8%8E%E7%82%B9C%E9%87%8D%E5%90%88%E6%8A%98%E7%97%95%E4%B8%BAEF%2CCE%E5%9E%82%E7%9B%B4%E4%BA%8EAB%28)
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