在△ABC中,AB=2,BC=2根号3,AC=4,E,F分别在AB,AC上,沿EF对着,使得点A落在BC上的点D(1)求AD的长:(2)判断四边形AEDF的形状,并证明你的结论.
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![在△ABC中,AB=2,BC=2根号3,AC=4,E,F分别在AB,AC上,沿EF对着,使得点A落在BC上的点D(1)求AD的长:(2)判断四边形AEDF的形状,并证明你的结论.](/uploads/image/z/7053269-5-9.jpg?t=%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2CAB%3D2%2CBC%3D2%E6%A0%B9%E5%8F%B73%2CAC%3D4%2CE%2CF%E5%88%86%E5%88%AB%E5%9C%A8AB%2CAC%E4%B8%8A%2C%E6%B2%BFEF%E5%AF%B9%E7%9D%80%2C%E4%BD%BF%E5%BE%97%E7%82%B9A%E8%90%BD%E5%9C%A8BC%E4%B8%8A%E7%9A%84%E7%82%B9D%EF%BC%881%EF%BC%89%E6%B1%82AD%E7%9A%84%E9%95%BF%EF%BC%9A%EF%BC%882%EF%BC%89%E5%88%A4%E6%96%AD%E5%9B%9B%E8%BE%B9%E5%BD%A2AEDF%E7%9A%84%E5%BD%A2%E7%8A%B6%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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