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如图,在直三棱柱ABC-A1B1C1中,AB=AC=5,BB1=BC=6,D,E分别是AA...
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如图,在直三棱柱ABC-A
1B
1C
1中,AB=AC=5,BB
1=BC=6,D,E分别是AA
1和B
1C的中点
(1)求证:DE∥平面ABC;
(2)求三棱锥E-BCD的体积.
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