在长方体ABCD-A
1B
1C
1D
1中,AB=BC=2,AA
1=4,过A
1、C
1、B三点的平面截去长方体的一个角后,得到如图所示的几何体ABCD-A
1C
1D
1.
(1)求几何体ABCD-A
1C
1D
1的体积;
(2)求直线BD
1与面A
1BC
1所成角的大小.(用反三角表示)
考点分析:
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