在如图所示的几何体中,四边形ABCD为菱形,
,
,
,
,
,点F在平面ABCD内的射影恰为BC的中点G.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/3/ba831ba5-1826-4024-8a16-eceb84a4b1b6.png?resizew=234)
(1)求证:平面
平面BED;
(2)求该几何体的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ec435aa1401dbce7863b531bf2f3e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/117878cbd8c00f2aabcdf62b487e2dc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeedb5f361a1baff6338436fff6c471d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60572975f9ac06ffc8d98ef94de49eb0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/3/ba831ba5-1826-4024-8a16-eceb84a4b1b6.png?resizew=234)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8dc6db50a9709c3f4d84eee7bdf1250.png)
(2)求该几何体的体积.
2023·河南安阳·二模 查看更多[3]
河南省安阳市2023届高三第二次模拟考试文科数学试题第13章 立体几何初步(A卷·基础提升练)-【单元测试】2022-2023学年高一数学分层训练AB卷(苏教版2019必修第二册)(已下线)期末复习07 空间几何线面、面面垂直-期末专项复习
更新时间:2023-04-02 21:00:25
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解答题-问答题
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解题方法
【推荐1】如图已知四棱锥A-BCC1B1底面为矩形,侧面ABC为等边三角形,且矩形BCC1B1与三角形ABC所在的平面互相垂直,BC=4,BB1=2,D为AC的中点.
![](https://img.xkw.com/dksih/QBM/2020/7/21/2510816558587904/2511607229235201/STEM/ef886d8b5b1542509e1dd8c0af546681.png?resizew=124)
(1)求证:
平面
;
(2)求点D到平面ABC1的距离.
![](https://img.xkw.com/dksih/QBM/2020/7/21/2510816558587904/2511607229235201/STEM/ef886d8b5b1542509e1dd8c0af546681.png?resizew=124)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1c920d02068d0e63ffdab70786c526d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4294ffdba16ae69fd03b13959d682aba.png)
(2)求点D到平面ABC1的距离.
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【推荐2】在直三棱柱
中,
,
,M,N分别是
,
的中点.
求证:直线
平面
;
求四棱锥
的表面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede6a60cad0e0b58e1549fda6e085719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45de082dfb670492300702f9aa422e91.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd19c4db61254be8512edf741bf9f978.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e383c6eca39a58bc94f2e42adb93bc1.png)
![](https://img.xkw.com/dksih/QBM/2018/7/24/1995619115376640/2011197327392768/STEM/3baffacc3aba4b85a203ef96183666ee.png?resizew=197)
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【推荐1】两个四棱锥的公共底面是边长为a的正方形,顶点位于底面的同侧,高均为h,并且两条高分别过底面一组对棱的中点,求这两个棱锥公共部分的体积.
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【推荐2】已知某几何体的直观图及该几何体的三视图如图所示,其中正(主)视图为矩形,俯视图为直角梯形,侧(左)视图为等腰直角三角形,尺寸如图所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/62339be1-a19c-42c1-8572-19701c3d3e5f.png?resizew=151)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/fcb42b7d-9b97-48e6-848a-722e3a9740b1.png?resizew=204)
(1)求此几何体的体积;
(2)求异面直线AC与
所成角的大小;
(3)求点
到平面
的距离.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/62339be1-a19c-42c1-8572-19701c3d3e5f.png?resizew=151)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/fcb42b7d-9b97-48e6-848a-722e3a9740b1.png?resizew=204)
(1)求此几何体的体积;
(2)求异面直线AC与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
(3)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a211ad5a06b505b8365a62c1946f3cb7.png)
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解题方法
【推荐1】如图,在四棱锥
中,底面
是矩形,
,
,
为正三角形,平面
平面
,
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/2021/6/30/2754103573848064/2761293874855936/STEM/a219216634ab418bb4fa34e40c324846.png?resizew=266)
(Ⅰ)证明:
平面
;
(Ⅱ)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/2021/6/30/2754103573848064/2761293874855936/STEM/a219216634ab418bb4fa34e40c324846.png?resizew=266)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a619288429fb6f75cc51f6c7fa43d03a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2a355389fc797dbe23960c55c18df83.png)
(Ⅱ)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2a355389fc797dbe23960c55c18df83.png)
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【推荐2】已知四棱锥S—ABCD中,∠SDA=2∠SAD=90°,∠BAD+∠ADC=180°,AB=
CD,点F是线段
![](https://img.xkw.com/dksih/QBM/2018/11/13/2074685664264192/2076112444219392/STEM/abd61723fcf140168940ed24a12b5917.png?resizew=192)
(1)在线段SB上作出点G,使得平面EFG∥平面SCD,请指明点G的具体位置,并用阴影部分表示平面EFG,不必说明平面EFG∥平面SCD的理由;
(2)若SA=SB=2,AB=AD=BD=
,求点F到平面SCD的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
SA上靠近点A的一个三等分点,AC与BD相交于E.
![](https://img.xkw.com/dksih/QBM/2018/11/13/2074685664264192/2076112444219392/STEM/abd61723fcf140168940ed24a12b5917.png?resizew=192)
(1)在线段SB上作出点G,使得平面EFG∥平面SCD,请指明点G的具体位置,并用阴影部分表示平面EFG,不必说明平面EFG∥平面SCD的理由;
(2)若SA=SB=2,AB=AD=BD=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
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解答题-证明题
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解题方法
【推荐1】如图,在四棱锥
中,侧面
是正三角形,且与底面
垂直,已知底面
是菱形,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/77e2ca8e-b809-4782-966c-ef5b7ee70557.png?resizew=178)
(1)求证:
;
(2)求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03977f376d19e1ba2e50881e511e3e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/77e2ca8e-b809-4782-966c-ef5b7ee70557.png?resizew=178)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b44f4120c94cb7176dc31fcac387b32e.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfe67036b4671b5d2a5c55b48c4d3bb9.png)
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解答题-问答题
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解题方法
【推荐2】如图,在直角三棱柱
中,
,
,
,
,
分别为
,
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/3f75168d-9a16-4bf4-98c0-77122c55bb3f.png?resizew=170)
(1)证明:平面
平面
;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/822ba132ca9dd0d4a050659aef3c9b26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/602cdfab573c9cb3ce030f8dba8a9390.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1859959fdb4c5edd8056893f94a10a0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/3f75168d-9a16-4bf4-98c0-77122c55bb3f.png?resizew=170)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df15eae3f1f614d09a61ac4706ae61cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0278f9809e118b80c9946d9b9ae40c83.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4feab537a7aaa3ea5a47bbed9e9421c4.png)
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