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如图,在底面是直角梯形的四棱锥S﹣ABCD中,∠ABC=90°,SA⊥面ABCD.SA=AB=BC=1,AD=. (1)求证:面SAB⊥面SBC, (2)设E为SC的中点,F为BC上的点,若面S...
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高二上学期数学《》真题及答案
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如图在四棱锥P﹣ABCD中底面ABCD为直角梯形AD∥BC∠ADC=90°平面PAD⊥底面ABCDQ
在底面是直角梯形的四棱锥S.-ABCD中∠ABC=90°SA⊥面ABCDSA=AB=BC=1AD=.
已知四棱锥P.-ABCD图1的三视图如图2所示△PBC为正三角形PA垂直底面ABCD俯视图是直角梯形
如图四棱锥P﹣ABCD中PA⊥面ABCD.底面ABCD为直角梯形∠ABC=∠BAD=90°PA=AB
如图在四棱锥P-ABCD中PC⊥底面ABCD底面ABCD是直角梯形AB⊥ADAB⊥CDAB=2AD=
如图已知四棱锥P.-ABCD中底面ABCD是直角梯形AB∥DC∠ABC=45°DC=1AB=2PA⊥
已知四棱锥S﹣ABCD的底面ABCD是直角梯形AB∥CDBC⊥AB侧面SAB为正三角形AB=BC=4
如图在底面为直角梯形的四棱锥P.-ABCD中AD∥BC∠ABC=90°PA⊥平面ABCDPA=3AD
如图四棱锥P.—ABCD中PA⊥平面ABCDPA=AB底面ABCD为直角梯形∠ABC=∠BAD=90
如图在四棱锥P-ABCD中底面为直角梯形AD∥BC∠BAD=90°PA⊥底面ABCD且PA=AD=A
如图四棱锥P.-ABCD中PA⊥平面ABCDPB与底面所成的角为45°底面ABCD为直角梯形∠ABC
如图已知在四棱锥P-ABCD中底面ABCD是直角梯形AB∥CD∠ABC=45°DC=1AB=2PA⊥
如图在四棱锥ABCD﹣PGFE中底面ABCD是直角梯形侧棱垂直于底面AB∥DC∠ABC=45°DC=
如图在四棱锥ABCD-PGFE中底面ABCD是直角梯形侧棱垂直于底面AB//DC∠ABC=45oDC
如图在四棱锥P-ABCD中底面为直角梯形AD∥BC∠BAD=90°PA⊥底面ABCD且PA=AD=A
如图在四棱锥P-ABCD中底面是直角梯形ABCD其中AD⊥ABCD∥ABAB=4CD=2侧面PAD与
[2012·三明普通高中联考]如图G.8-5已知四棱锥P.-ABCD中底面ABCD是直角梯形AB∥C
如图在四棱锥P.-ABCD中已知PA⊥平面ABCDPB与平面ABC成60°的角底面ABCD是直角梯形
如图四棱锥P.―ABCD中底面ABCD是直角梯形∠ABC=90°AD//BCCB⊥侧面PAB△PAB
如图在底面为直角梯形的四棱锥P.—ABCD中AD∥BC∠ABC=90°PA⊥平面ABCDPA=3AD
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