如图所示,菱形ABCD中,∠A=120°,⊙O为△ABC外接圆,M为其上一点,连接MC交AB于E,AM交CB延长线于F.求证:D,E,F三点共线.
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![如图所示,菱形ABCD中,∠A=120°,⊙O为△ABC外接圆,M为其上一点,连接MC交AB于E,AM交CB延长线于F.求证:D,E,F三点共线.](/uploads/image/z/8850953-65-3.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E8%8F%B1%E5%BD%A2ABCD%E4%B8%AD%2C%E2%88%A0A%3D120%C2%B0%2C%E2%8A%99O%E4%B8%BA%E2%96%B3ABC%E5%A4%96%E6%8E%A5%E5%9C%86%2CM%E4%B8%BA%E5%85%B6%E4%B8%8A%E4%B8%80%E7%82%B9%2C%E8%BF%9E%E6%8E%A5MC%E4%BA%A4AB%E4%BA%8EE%2CAM%E4%BA%A4CB%E5%BB%B6%E9%95%BF%E7%BA%BF%E4%BA%8EF%EF%BC%8E%E6%B1%82%E8%AF%81%EF%BC%9AD%2CE%2CF%E4%B8%89%E7%82%B9%E5%85%B1%E7%BA%BF%EF%BC%8E)
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