在梯形ABCD中,AB平行DC,AD=BC,AB=10,CD=4,延长BD到E使DE=BD,作EF垂直AB交BA的延长线于点F,求BF的长
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![在梯形ABCD中,AB平行DC,AD=BC,AB=10,CD=4,延长BD到E使DE=BD,作EF垂直AB交BA的延长线于点F,求BF的长](/uploads/image/z/3527010-18-0.jpg?t=%E5%9C%A8%E6%A2%AF%E5%BD%A2ABCD%E4%B8%AD%2CAB%E5%B9%B3%E8%A1%8CDC%2CAD%3DBC%2CAB%3D10%2CCD%3D4%2C%E5%BB%B6%E9%95%BFBD%E5%88%B0E%E4%BD%BFDE%3DBD%2C%E4%BD%9CEF%E5%9E%82%E7%9B%B4AB%E4%BA%A4BA%E7%9A%84%E5%BB%B6%E9%95%BF%E7%BA%BF%E4%BA%8E%E7%82%B9F%2C%E6%B1%82BF%E7%9A%84%E9%95%BF)
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