11-12高二上·广东·期中
名校
解题方法
1 . 如图,在三棱锥P﹣ABC中,E,F分别为AC,BC的中点.
(1)求证:EF∥平面PAB;
(2)若平面PAC⊥平面ABC,且PA=PC,∠ABC=90°,求证:平面PEF⊥平面PBC.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/14/00199af2-9023-45c7-afc6-8b6f3d2bf55e.png?resizew=158)
(1)求证:EF∥平面PAB;
(2)若平面PAC⊥平面ABC,且PA=PC,∠ABC=90°,求证:平面PEF⊥平面PBC.
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2016-12-04更新
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599次组卷
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9卷引用:2011-2012学年度广东省东山中学高二第一学期期中理科数学试卷
(已下线)2011-2012学年度广东省东山中学高二第一学期期中理科数学试卷浙江省嘉兴市南湖区第一中学2019-2020学年高二上学期期中数学试题山东省东营市广饶县第一中学三校区2022-2023学年高二9月月考数学试题(已下线)2011-2012学年福建省福安一中高一下学期第一次月考数学试卷(已下线)2011-2012学年江西省会昌中学高一下学期第二次月考文科数学试卷2015-2016学年湖南省邵阳市邵东县高一上学期期末数学试卷(已下线)2018年11月25日 《每日一题》人教必修2-每周一测山东省泰安市2020-2021学年高一下学期期末数学试题山东省临沂市蒙阴县第一中学2022-2023学年高一下学期第二次月考数学试题
2 . 如图所示,四边形ABCD是菱形,O是AC与BD的交点,SA⊥平面ABCD
![](https://img.xkw.com/dksih/QBM/2016/3/8/1572526348410880/1572526353981440/STEM/93f3aaa998b54c09979319075893db33.png)
(Ⅰ)求证:平面SAC⊥平面SBD;
(Ⅱ)若∠DAB=120°,DS⊥BS,AB=2,求SO的长及点A到平面SBD的距离.
![](https://img.xkw.com/dksih/QBM/2016/3/8/1572526348410880/1572526353981440/STEM/93f3aaa998b54c09979319075893db33.png)
(Ⅰ)求证:平面SAC⊥平面SBD;
(Ⅱ)若∠DAB=120°,DS⊥BS,AB=2,求SO的长及点A到平面SBD的距离.
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3 . 在如图的多面体中,EF⊥平面AEB,AE⊥EB,AD∥EF,EF∥BC,BC=2AD=4,EF=3,AE=BE=2,G是BC的中点.
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572462281269248/1572462287331328/STEM/a677a6ec39c6487db4f439213e599586.png)
(Ⅰ)求证:AB∥平面DEG;
(Ⅱ)求证:BD⊥EG.
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572462281269248/1572462287331328/STEM/a677a6ec39c6487db4f439213e599586.png)
(Ⅰ)求证:AB∥平面DEG;
(Ⅱ)求证:BD⊥EG.
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4 . 如图,底面为正三角形的三棱柱ABC﹣A1B1C1中,侧棱垂直于底面,D为线段B1C1中点.
![](https://img.xkw.com/dksih/QBM/2016/4/13/1572592510124032/1572592516038656/STEM/b88feafdcab24ceb890b7623d832b077.png)
(Ⅰ) 证明:AC1∥平面A1BD;
(Ⅱ) 在棱CC1上是否存在一点E,使得平面A1BE⊥平面A1ABB1?若存在,请找出点E所在位置,并给出证明;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2016/4/13/1572592510124032/1572592516038656/STEM/b88feafdcab24ceb890b7623d832b077.png)
(Ⅰ) 证明:AC1∥平面A1BD;
(Ⅱ) 在棱CC1上是否存在一点E,使得平面A1BE⊥平面A1ABB1?若存在,请找出点E所在位置,并给出证明;若不存在,请说明理由.
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2016-12-04更新
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463次组卷
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2卷引用:2015-2016学年广东省佛山市高二上学期期末文科数学试卷
5 . 如图,已知
,
分别是正方形
边
、
的中点,
与
交于点
,
、
都垂直于平面
,且
,
,
是线段
上一动点.
![](https://img.xkw.com/dksih/QBM/2015/10/8/1572247535755264/1572247541628928/STEM/10ee63f2d5a241b5a5c86931a8515522.png)
(Ⅰ)求证:平面
平面
;
(Ⅱ)若
平面
,试求
的值;
(Ⅲ)当
是
中点时,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dafebaaf13781120dc57c277d0267c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9a4950a6e4202efd609507964af238b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18091448701460b53e076331e7c575cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://img.xkw.com/dksih/QBM/2015/10/8/1572247535755264/1572247541628928/STEM/10ee63f2d5a241b5a5c86931a8515522.png)
(Ⅰ)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba9008f244e609ad267e10b8861c8254.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94cc30d46b4538a4c86064df7460356.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bb178784aa857d4d4683e650273f054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed4cba9d2412e4a28f8740bddd5738d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ad337a2ee42c1d43458859014c54b92.png)
(Ⅲ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fa5cd4da0137515627593735100978e.png)
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2012·浙江台州·二模
名校
6 . 如图,AC是圆O的直径,点B在圆O上,∠BAC=30°,BM⊥AC交AC于点M,EA⊥平面ABC,FC//EA,AC=4,EA=3,FC=1.
(1)证明:EM⊥BF;
(2)求平面BEF与平面ABC所成的二面角的余弦值.
(1)证明:EM⊥BF;
(2)求平面BEF与平面ABC所成的二面角的余弦值.
![](https://img.xkw.com/dksih/QBM/2012/7/30/1570943890194432/1570943895568384/STEM/5e458b96-13c1-4413-af71-836dc330dd33.png?resizew=146)
您最近一年使用:0次
2016-12-01更新
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1376次组卷
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9卷引用:广东省广州市第二中学高二上学期数学人教A版选修2-1模块测试试卷
广东省广州市第二中学高二上学期数学人教A版选修2-1模块测试试卷(已下线)2012届浙江省台州中学高三下学期第二次统练文科数学(已下线)2012届浙江省宁波市五校高三适应性考试理科数学试卷(已下线)2012届浙江省东阳中学高三5月模拟考试理科数学试卷(已下线)2014届浙江省绍兴市第一中学高三上学期回头考试理科数学试卷2016届海南省文昌中学高三上学期期末考试理科数学试卷2017届陕西师范大学附属中学高三上学期第二次模考数学(理)试卷陕西省西安市长安区第一中学2017届高三4月模拟考试数学(理)试题2018届高三数学训练题:阶段滚动检测试题(六)
7 . 如图,在三棱锥
中,平面
平面
,
,
,过
作
,垂足为
,点
分别是棱
的中点.
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572177749975040/1572177755856896/STEM/5e6ed79619724f8a995e4e288d71fa05.png)
求证:(1)平面
平面
; (2)
.
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572177749975040/1572177755856896/STEM/b8b4627e0ee746b6a869b7c0518e7c50.png)
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572177749975040/1572177755856896/STEM/4dde54b789a045e299bd3d347b0f33fe.png)
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572177749975040/1572177755856896/STEM/a0abd3dff20f4df78d34d33ccc3958be.png)
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572177749975040/1572177755856896/STEM/668354606a1b42a7a43170ced66bdb70.png)
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572177749975040/1572177755856896/STEM/c57030df5014430e8803442c1585e31e.png)
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572177749975040/1572177755856896/STEM/7733030cd3bd415c9ea3908b2140e5ac.png)
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572177749975040/1572177755856896/STEM/12222ea1107d4aaca273fc766d954b7d.png)
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572177749975040/1572177755856896/STEM/dd4c6c9bac7d4143a2f65e19893451c5.png)
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572177749975040/1572177755856896/STEM/2288524aa5c04a7192c6e88318aef7dc.png)
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572177749975040/1572177755856896/STEM/fababe80039d4339ba0094fc6b0e886d.png)
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572177749975040/1572177755856896/STEM/5e6ed79619724f8a995e4e288d71fa05.png)
求证:(1)平面
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572177749975040/1572177755856896/STEM/8a9bad60b51d4a6393ed4a923b102964.png)
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572177749975040/1572177755856896/STEM/4ec3160b173a486f849f9707554229a5.png)
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572177749975040/1572177755856896/STEM/db54de8cdaf74f62a6c9b6da522746b5.png)
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8 . 如图,
是半径为
的半圆,
为直径,点
为
的中点,点
和点
为线段
的三等分点,平面
外一点
满足
平面
,
.
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572178491924480/1572178497880064/STEM/04632768d1524054a33db6076799e2ca.png)
(1)证明:
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e2da608b66c9aee03e2503388ba4fd.png)
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572178491924480/1572178497880064/STEM/3fb4308cc4024daea54217935a902f43.png)
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572178491924480/1572178497880064/STEM/5ca566db478945e397a19f3ff6a67e8b.png)
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572178491924480/1572178497880064/STEM/fe80ee3aa02c4773bb790f6980a9cef0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572178491924480/1572178497880064/STEM/030b4dcd10654a07b400fab2bcdfb45a.png)
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572178491924480/1572178497880064/STEM/a8cfdf7ab62b4a02bbc36353f7be767c.png)
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572178491924480/1572178497880064/STEM/3546f7c57fc64148b5e6f45eadeba0b4.png)
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572178491924480/1572178497880064/STEM/6868bd0380a44a74aa371b219af30ef0.png)
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572178491924480/1572178497880064/STEM/94a7b841abac4a5b9068f80ec5153899.png)
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572178491924480/1572178497880064/STEM/d0d033e0948343ce926a7f075e514bdd.png)
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572178491924480/1572178497880064/STEM/e5939a524876480f8d81b59a7d218146.png)
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572178491924480/1572178497880064/STEM/ed509aa771b94ef1b9dfcd696159673d.png)
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572178491924480/1572178497880064/STEM/04632768d1524054a33db6076799e2ca.png)
(1)证明:
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572178491924480/1572178497880064/STEM/70db6c961a75483d938cede2927c8e52.png)
(2)求点
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572178491924480/1572178497880064/STEM/030b4dcd10654a07b400fab2bcdfb45a.png)
![](https://img.xkw.com/dksih/QBM/2015/7/10/1572178491924480/1572178497880064/STEM/16b8c3810d5b40f69a346421914b90c0.png)
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