1 . 四棱锥
中,底面
为矩形,
,
,
,
.
(1)平面
与平面
的交线为
,证明:
;
(2)
,求二面角
的余弦值.
![](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/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d783fe7f3ce673d5d21281174e7a7968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bec03e804f0cea1db5cde2aa185056a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/24/d31b915c-3378-4eb1-a77a-f482d1195fb4.png?resizew=180)
(1)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/672e57c6ab0c23d782a1ae1116106834.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff0a0c299356c26338d4153748e8a61d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c5651e38293e0c42a7278af69fa53ae.png)
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名校
解题方法
2 . 如图,在四棱锥
中,
,且
.点
是线段
上一动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/17/e3579055-14be-4658-bb9d-b647030f29b1.png?resizew=178)
(1)当
平面
时,求
的值;
(2)点
是线段
上运动的过程中,能否使得二面角
的大小为
?若存在,求出
的位置;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/006eabc4d46b28bced4011510489261a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76894e0861c36728a28d273ea6efba47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/17/e3579055-14be-4658-bb9d-b647030f29b1.png?resizew=178)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa69a2247ad4d5231aa361349b12f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb304d905125170bebfada27e7ed8960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/241a37fb1eff68a7133822b1b52d627e.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a833eb36d4b3ab4769d8d9b65d0755d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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解题方法
3 . 故宫太和殿是中国形制最高的宫殿,其建筑采用了重檐庑殿顶的屋顶样式,庑殿顶是“四出水”的五脊四坡式,由一条正脊和四条垂脊组成,因此又称五脊殿.由于屋顶有四面斜坡,故又称四阿顶.如图,某几何体
有五个面,其形状与四阿顶相类似.已知底面
为矩形,
,
底面
,且
,
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/eaa638a1-f6de-4f2a-9112-319c60acf133.png?resizew=239)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/aa5c318f-8f38-462b-bbe8-ff7a58f30ca0.png?resizew=212)
(1)证明:
,且
平面
.
(2)若
与底面
所成的角为
,过点
作
,垂足为
,过
作平面
的垂线,写出作法,并求
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74366b8e78790299c19fa78eb43b1e57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7a407b262c22419f73396170ecdc849.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdd384e94139c3f2d93ce8f38e26db95.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/eaa638a1-f6de-4f2a-9112-319c60acf133.png?resizew=239)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/aa5c318f-8f38-462b-bbe8-ff7a58f30ca0.png?resizew=212)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c197d8b99f2eb7477947e53461b5d548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12f4248e8021130ab60365e3d2e9a694.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ab98fce4c908b9e86193825bf85fc03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
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2022-11-26更新
|
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|
2卷引用:贵州省遵义市2023届高三上学期第三次月考数学(文)试题
解题方法
4 . 如图,在多面体
中,已知
,
,
,平面
平面
,四边形
是正方形.
![](https://img.xkw.com/dksih/QBM/2022/11/17/3111590721298432/3112302315495424/STEM/1782cf070c5e4ae98c54ec2ba7b0d85e.png?resizew=185)
(1)求证:
平面
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71f2185273bf04c11118c7954f7ec822.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/657d5471e57b894c3833bb3f43ff38ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2a1ce226f636a38dcb980164d69e46a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a41e1be0d39b6666edcf4f2d5fe7729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/653ddc9c58281c1cc096de7c15ed0749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0bc51695e51aa8cd2f97d220c8f5340.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0bc51695e51aa8cd2f97d220c8f5340.png)
![](https://img.xkw.com/dksih/QBM/2022/11/17/3111590721298432/3112302315495424/STEM/1782cf070c5e4ae98c54ec2ba7b0d85e.png?resizew=185)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735f54742d82c3d9340220466e77ccae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0bc51695e51aa8cd2f97d220c8f5340.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/719103f93166bab4828257608e641a9a.png)
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解题方法
5 . 如图,在三棱柱
中,已知点G,H分别在
,
上,且GH经过
的重心,点E,F分别是AB,AC的中点,且B、C、G、H四点共面,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
A.![]() | B.![]() ![]() |
C.![]() | D.平面![]() ![]() |
您最近一年使用:0次
2022-09-29更新
|
1439次组卷
|
4卷引用:贵州省六盘水市第二中学2022-2023学年高二上学期9月月考数学试题
6 . 在四棱锥
中,已知
底面
,且底面
为矩形,则下列结论中错误的是( )
![](https://img.xkw.com/dksih/QBM/2022/7/6/3016619426725888/3018752047947776/STEM/a8123b9306974bdfa25bf1d327d5eb1a.png?resizew=163)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2022/7/6/3016619426725888/3018752047947776/STEM/a8123b9306974bdfa25bf1d327d5eb1a.png?resizew=163)
A.平面![]() ![]() | B.平面![]() ![]() |
C.平面![]() ![]() | D.平面![]() ![]() |
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解题方法
7 . 在棱长为2的正方体ABCD-A1B1C1D1中,N为BC的中点.当点M在平面DCC1D1内运动时,有MN//平面A1BD则线段MN的最小值为( )
A.1 | B.![]() | C.![]() | D.![]() |
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2022-06-23更新
|
840次组卷
|
9卷引用:贵州省铜仁市江口中学2022-2023学年高二上学期9月月考数学试题
贵州省铜仁市江口中学2022-2023学年高二上学期9月月考数学试题(已下线)考向33 空间中的平行关系(已下线)专题23 立体几何中平行的存在性问题-【重难点突破】2021-2022学年高一数学常考题专练(人教A版2019必修第二册)江苏省镇江市扬中市第二高级中学2021-2022学年高二下学期期末适应性测试数学试题江苏省盐城市滨海中学2022届高三下学期高考前指导数学试题(一)(已下线)第03讲 空间直线、平面的平行 (精讲)-2(已下线)专题8-3 立体几何压轴小题:动点与轨迹、距离最值-2江苏省南通市2021届高三下学期5月四模数学试题(已下线)2021年秋季高三数学开学摸底考试卷02(江苏专用)
名校
解题方法
8 . 如图,已知四棱锥P-ABCD的底面是平行四边形,E为AD的中点,F在PA上,AP=λAF,若PC//平面BEF,则λ的值为_________ .
您最近一年使用:0次
2022-06-18更新
|
737次组卷
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6卷引用:贵州省遵义市第五中学2021-2022学年高二上学期期中考试数学(理)试题
贵州省遵义市第五中学2021-2022学年高二上学期期中考试数学(理)试题(已下线)第03讲 空间直线、平面的平行 (精讲)-2辽宁省鞍山市鞍钢高级中学2022-2023学年高二上学期10月月考数学试题四川省仁寿第一中学校南校区2022-2023学年高二上学期期末文科数学试题(已下线)10.3 直线与平面间的位置关系(第1课时)(八大题型)(分层练习)-2023-2024学年高二数学同步精品课堂(沪教版2020必修第三册)江苏省镇江市、南京市联盟校2023-2024学年高一下学期5月学情调查数学试题
名校
解题方法
9 . 如图,四棱锥
中,平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5df2286c6ad87a347aea399a6029b8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6f40adfbe0141f55a19baf2fb218eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2234205f80829a5bbc6ae3a675fe4f85.png)
.M是CD中点,N是PB上一点.
![](https://img.xkw.com/dksih/QBM/2022/6/2/2992893435928576/2996195895820288/STEM/36f06cd0-c034-4311-9c19-b10128629da3.png?resizew=202)
(1)若
求三棱锥
的体积;
(2)是否存在点N,使得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
平面
,若存在求PN的长;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5df2286c6ad87a347aea399a6029b8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6f40adfbe0141f55a19baf2fb218eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2234205f80829a5bbc6ae3a675fe4f85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66a100d352bda24b7b8360ccae5789c1.png)
![](https://img.xkw.com/dksih/QBM/2022/6/2/2992893435928576/2996195895820288/STEM/36f06cd0-c034-4311-9c19-b10128629da3.png?resizew=202)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc0df47f62dacbf3503f24164b0541ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d82e1b9949d05ef17c0cd24eb9ff9e92.png)
(2)是否存在点N,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
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2022-06-07更新
|
1714次组卷
|
6卷引用:贵阳第一中学2022届5月高三高考适应性月考卷(八)数学(文)试题
贵阳第一中学2022届5月高三高考适应性月考卷(八)数学(文)试题(已下线)专题14 立体几何(文科)-备战2023年高考数学母题题源解密(全国通用)(已下线)第50讲 用综合法求角与距离(已下线)8.5.2 直线与平面平行 (精讲)(2)-【精讲精练】2022-2023学年高一数学下学期同步精讲精练(人教A版2019必修第二册)(已下线)8.5.2 直线与平面平行(精练)-【题型分类归纳】2022-2023学年高一数学同步讲与练(人教A版2019必修第二册)(已下线)第五章 破解立体几何开放探究问题 专题二 立体几何开放题的解法 微点2 立体几何开放题的解法综合训练【基础版】
名校
10 . 如图,在直三棱柱
中,
,M为棱
上一点.
的交线为l,证明
;
(2)若M为
的中点,且二面角A-CM-B的正切值为3,求线段BC的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17b964b9935646ab49cecd400234c1ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eca73676b19b1d3eed63cc51ada687.png)
(2)若M为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
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2022-05-29更新
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4卷引用:贵州省黔东南州榕江县第一中学2022-2023学年高二上学期开学考试数学试题