在梯形ABCD中,上底AD=1cm,下底BC=4cm,对角线BD垂直AC,且BD=3cm,AC=4cm,求梯形ABCD的面积.
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![在梯形ABCD中,上底AD=1cm,下底BC=4cm,对角线BD垂直AC,且BD=3cm,AC=4cm,求梯形ABCD的面积.](/uploads/image/z/9499590-54-0.jpg?t=%E5%9C%A8%E6%A2%AF%E5%BD%A2ABCD%E4%B8%AD%2C%E4%B8%8A%E5%BA%95AD%3D1cm%2C%E4%B8%8B%E5%BA%95BC%3D4cm%2C%E5%AF%B9%E8%A7%92%E7%BA%BFBD%E5%9E%82%E7%9B%B4AC%2C%E4%B8%94BD%3D3cm%2CAC%3D4cm%2C%E6%B1%82%E6%A2%AF%E5%BD%A2ABCD%E7%9A%84%E9%9D%A2%E7%A7%AF.)
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