梯形ABCD中,AD‖BC,E是AB上一点,EF‖BC交DC于F,若AE=3CM,EB=5CM,CD=6CM,AD=12CM,B梯形ABCD中,AD‖BC,E是AB上一点,EF‖BC交DC于F,若AE=3CM,EB=5CM,CD=6CM,求证:DF,FC 若AD=12CM,BC=18CM,且AE:EB=2:3,求证,EF.
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![梯形ABCD中,AD‖BC,E是AB上一点,EF‖BC交DC于F,若AE=3CM,EB=5CM,CD=6CM,AD=12CM,B梯形ABCD中,AD‖BC,E是AB上一点,EF‖BC交DC于F,若AE=3CM,EB=5CM,CD=6CM,求证:DF,FC 若AD=12CM,BC=18CM,且AE:EB=2:3,求证,EF.](/uploads/image/z/3803114-2-4.jpg?t=%E6%A2%AF%E5%BD%A2ABCD%E4%B8%AD%2CAD%E2%80%96BC%2CE%E6%98%AFAB%E4%B8%8A%E4%B8%80%E7%82%B9%2CEF%E2%80%96BC%E4%BA%A4DC%E4%BA%8EF%2C%E8%8B%A5AE%3D3CM%2CEB%3D5CM%2CCD%3D6CM%2CAD%3D12CM%2CB%E6%A2%AF%E5%BD%A2ABCD%E4%B8%AD%2CAD%E2%80%96BC%2CE%E6%98%AFAB%E4%B8%8A%E4%B8%80%E7%82%B9%2CEF%E2%80%96BC%E4%BA%A4DC%E4%BA%8EF%2C%E8%8B%A5AE%3D3CM%2CEB%3D5CM%2CCD%3D6CM%2C%E6%B1%82%E8%AF%81%3ADF%2CFC+%E8%8B%A5AD%3D12CM%2CBC%3D18CM%2C%E4%B8%94AE%3AEB%3D2%3A3%2C%E6%B1%82%E8%AF%81%2CEF.)
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