高二文科数学题(立体几何)在四棱锥P-ABCD中,侧面PCD垂直地面ABCD,PD垂直CD,E为OC中点,底面ABCD是直角梯形,AB//CD,角ABC=90度,AB=AD=PD=1,CD=2.(1)求证:BE//平面PAD(2)求证:BC垂直平面PBD
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![高二文科数学题(立体几何)在四棱锥P-ABCD中,侧面PCD垂直地面ABCD,PD垂直CD,E为OC中点,底面ABCD是直角梯形,AB//CD,角ABC=90度,AB=AD=PD=1,CD=2.(1)求证:BE//平面PAD(2)求证:BC垂直平面PBD](/uploads/image/z/5528962-10-2.jpg?t=%E9%AB%98%E4%BA%8C%E6%96%87%E7%A7%91%E6%95%B0%E5%AD%A6%E9%A2%98%EF%BC%88%E7%AB%8B%E4%BD%93%E5%87%A0%E4%BD%95%EF%BC%89%E5%9C%A8%E5%9B%9B%E6%A3%B1%E9%94%A5P-ABCD%E4%B8%AD%2C%E4%BE%A7%E9%9D%A2PCD%E5%9E%82%E7%9B%B4%E5%9C%B0%E9%9D%A2ABCD%2CPD%E5%9E%82%E7%9B%B4CD%2CE%E4%B8%BAOC%E4%B8%AD%E7%82%B9%2C%E5%BA%95%E9%9D%A2ABCD%E6%98%AF%E7%9B%B4%E8%A7%92%E6%A2%AF%E5%BD%A2%2CAB%2F%2FCD%2C%E8%A7%92ABC%3D90%E5%BA%A6%2CAB%3DAD%3DPD%3D1%2CCD%3D2.%EF%BC%881%EF%BC%89%E6%B1%82%E8%AF%81%EF%BC%9ABE%2F%2F%E5%B9%B3%E9%9D%A2PAD%282%29%E6%B1%82%E8%AF%81%EF%BC%9ABC%E5%9E%82%E7%9B%B4%E5%B9%B3%E9%9D%A2PBD)
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