等腰梯形PDCB,PB=3,DC=1,PD=BC=√ 2,A我PB上一点,PA=1,将三角形PAD沿D折起,使面PAD垂直ABCD(1)证明平面PAD垂直平面PCD(2)试在棱PB上确定一点M使截面AMC把几何体分成两部分Vm-DCMA:Vm-ACB=2:1(3)在M满足
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![等腰梯形PDCB,PB=3,DC=1,PD=BC=√ 2,A我PB上一点,PA=1,将三角形PAD沿D折起,使面PAD垂直ABCD(1)证明平面PAD垂直平面PCD(2)试在棱PB上确定一点M使截面AMC把几何体分成两部分Vm-DCMA:Vm-ACB=2:1(3)在M满足](/uploads/image/z/4042935-63-5.jpg?t=%E7%AD%89%E8%85%B0%E6%A2%AF%E5%BD%A2PDCB%2CPB%3D3%2CDC%3D1%2CPD%3DBC%3D%E2%88%9A+2%2CA%E6%88%91PB%E4%B8%8A%E4%B8%80%E7%82%B9%2CPA%3D1%2C%E5%B0%86%E4%B8%89%E8%A7%92%E5%BD%A2PAD%E6%B2%BFD%E6%8A%98%E8%B5%B7%2C%E4%BD%BF%E9%9D%A2PAD%E5%9E%82%E7%9B%B4ABCD%EF%BC%881%EF%BC%89%E8%AF%81%E6%98%8E%E5%B9%B3%E9%9D%A2PAD%E5%9E%82%E7%9B%B4%E5%B9%B3%E9%9D%A2PCD%EF%BC%882%EF%BC%89%E8%AF%95%E5%9C%A8%E6%A3%B1PB%E4%B8%8A%E7%A1%AE%E5%AE%9A%E4%B8%80%E7%82%B9M%E4%BD%BF%E6%88%AA%E9%9D%A2AMC%E6%8A%8A%E5%87%A0%E4%BD%95%E4%BD%93%E5%88%86%E6%88%90%E4%B8%A4%E9%83%A8%E5%88%86Vm-DCMA%3AVm-ACB%3D2%3A1%EF%BC%883%EF%BC%89%E5%9C%A8M%E6%BB%A1%E8%B6%B3)
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