梯形ABCD中,角ABC=90,AB=BC=2AD,P为梯形内一点,PA=1,PB=2,PC=3,求梯形ABCD的面积
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![梯形ABCD中,角ABC=90,AB=BC=2AD,P为梯形内一点,PA=1,PB=2,PC=3,求梯形ABCD的面积](/uploads/image/z/12557607-15-7.jpg?t=%E6%A2%AF%E5%BD%A2ABCD%E4%B8%AD%2C%E8%A7%92ABC%3D90%2CAB%3DBC%3D2AD%2CP%E4%B8%BA%E6%A2%AF%E5%BD%A2%E5%86%85%E4%B8%80%E7%82%B9%2CPA%3D1%2CPB%3D2%2CPC%3D3%2C%E6%B1%82%E6%A2%AF%E5%BD%A2ABCD%E7%9A%84%E9%9D%A2%E7%A7%AF)
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