正方形ABCD中,P是对角线AC上一点,过点P作PF⊥CD于点F.连接PB,过点P作PE⊥PB且PE交线段CD于点E.(1) 求证:DF=EF;(2) 写出线段PC、PA、CE之间的一个等量关系,并证明你的结论
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![正方形ABCD中,P是对角线AC上一点,过点P作PF⊥CD于点F.连接PB,过点P作PE⊥PB且PE交线段CD于点E.(1) 求证:DF=EF;(2) 写出线段PC、PA、CE之间的一个等量关系,并证明你的结论](/uploads/image/z/7154840-56-0.jpg?t=%E6%AD%A3%E6%96%B9%E5%BD%A2ABCD%E4%B8%AD%2CP%E6%98%AF%E5%AF%B9%E8%A7%92%E7%BA%BFAC%E4%B8%8A%E4%B8%80%E7%82%B9%2C%E8%BF%87%E7%82%B9P%E4%BD%9CPF%E2%8A%A5CD%E4%BA%8E%E7%82%B9F.%E8%BF%9E%E6%8E%A5PB%2C%E8%BF%87%E7%82%B9P%E4%BD%9CPE%E2%8A%A5PB%E4%B8%94PE%E4%BA%A4%E7%BA%BF%E6%AE%B5CD%E4%BA%8E%E7%82%B9E.%281%29+%E6%B1%82%E8%AF%81%EF%BC%9ADF%3DEF%EF%BC%9B%282%29+%E5%86%99%E5%87%BA%E7%BA%BF%E6%AE%B5PC%E3%80%81PA%E3%80%81CE%E4%B9%8B%E9%97%B4%E7%9A%84%E4%B8%80%E4%B8%AA%E7%AD%89%E9%87%8F%E5%85%B3%E7%B3%BB%2C%E5%B9%B6%E8%AF%81%E6%98%8E%E4%BD%A0%E7%9A%84%E7%BB%93%E8%AE%BA)
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