(本题13分)在几何体ABCDE中,∠BAC= ,DC⊥平面ABC,EB⊥平面ABC,F是BC的中点,AB=AC=BE=2,CD=1.
(1)求证:DC∥平面ABE;
(2)求证:AF⊥平面BCDE;
(3)求几何体ABCDE的体积.
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(本题13分)在几何体ABCDE中,∠BAC= ,DC⊥平面ABC,EB⊥平面ABC,F是BC的中点,AB=AC=BE=2,CD=1.
(1)求证:DC∥平面ABE;
(2)求证:AF⊥平面BCDE;
(3)求几何体ABCDE的体积.
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