直角梯形中ABCD,AB⊥CD,AB⊥BC,E为AB上的点,且AD=AE=DC=2,BE=1,将三角形ADE沿DE折叠到点P,使PC=PB.求证:1)面PDE⊥面ABCD; 2)求四棱锥P-EBCD的体积.不好意思,题打错了,应该是: 直角梯形中ABCD,AB∥CD
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![直角梯形中ABCD,AB⊥CD,AB⊥BC,E为AB上的点,且AD=AE=DC=2,BE=1,将三角形ADE沿DE折叠到点P,使PC=PB.求证:1)面PDE⊥面ABCD; 2)求四棱锥P-EBCD的体积.不好意思,题打错了,应该是: 直角梯形中ABCD,AB∥CD](/uploads/image/z/6133317-69-7.jpg?t=%E7%9B%B4%E8%A7%92%E6%A2%AF%E5%BD%A2%E4%B8%ADABCD%2CAB%E2%8A%A5CD%2CAB%E2%8A%A5BC%2CE%E4%B8%BAAB%E4%B8%8A%E7%9A%84%E7%82%B9%2C%E4%B8%94AD%3DAE%3DDC%3D2%2CBE%3D1%2C%E5%B0%86%E4%B8%89%E8%A7%92%E5%BD%A2ADE%E6%B2%BFDE%E6%8A%98%E5%8F%A0%E5%88%B0%E7%82%B9P%2C%E4%BD%BFPC%3DPB.%E6%B1%82%E8%AF%81%3A1%29%E9%9D%A2PDE%E2%8A%A5%E9%9D%A2ABCD%3B++++++++2%29%E6%B1%82%E5%9B%9B%E6%A3%B1%E9%94%A5P-EBCD%E7%9A%84%E4%BD%93%E7%A7%AF.%E4%B8%8D%E5%A5%BD%E6%84%8F%E6%80%9D%EF%BC%8C%E9%A2%98%E6%89%93%E9%94%99%E4%BA%86%EF%BC%8C%E5%BA%94%E8%AF%A5%E6%98%AF%EF%BC%9A+++%E7%9B%B4%E8%A7%92%E6%A2%AF%E5%BD%A2%E4%B8%ADABCD%2CAB%E2%88%A5CD)
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