如图,已知四边形ABCD中,AC是对角线,F是AD上一点,E是BC上一点,且DF=BE.求证:EF过AC的中点.无法证角FAO=ECO 角AOF=COE 看清已知条件里面没有平行四边形!
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![如图,已知四边形ABCD中,AC是对角线,F是AD上一点,E是BC上一点,且DF=BE.求证:EF过AC的中点.无法证角FAO=ECO 角AOF=COE 看清已知条件里面没有平行四边形!](/uploads/image/z/5189130-18-0.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%B7%B2%E7%9F%A5%E5%9B%9B%E8%BE%B9%E5%BD%A2ABCD%E4%B8%AD%2CAC%E6%98%AF%E5%AF%B9%E8%A7%92%E7%BA%BF%2CF%E6%98%AFAD%E4%B8%8A%E4%B8%80%E7%82%B9%2CE%E6%98%AFBC%E4%B8%8A%E4%B8%80%E7%82%B9%2C%E4%B8%94DF%3DBE.%E6%B1%82%E8%AF%81%EF%BC%9AEF%E8%BF%87AC%E7%9A%84%E4%B8%AD%E7%82%B9.%E6%97%A0%E6%B3%95%E8%AF%81%E8%A7%92FAO%3DECO+%E8%A7%92AOF%3DCOE++%E7%9C%8B%E6%B8%85%E5%B7%B2%E7%9F%A5%E6%9D%A1%E4%BB%B6%E9%87%8C%E9%9D%A2%E6%B2%A1%E6%9C%89%E5%B9%B3%E8%A1%8C%E5%9B%9B%E8%BE%B9%E5%BD%A2%EF%BC%81)
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