名校
1 . 如图,在棱长为2的正方体
中,
分别是
的中点,
是线段
上的动点,则下列说法中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d01f094cfc640566027b122e3fbc9fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ef92425dcb553a585721522c904739c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94ce22f30a8de2af135de3c89403aff.png)
A.存在点![]() ![]() |
B.存在点![]() ![]() ![]() |
C.三棱锥![]() ![]() |
D.经过![]() ![]() |
您最近一年使用:0次
2024-05-05更新
|
2366次组卷
|
10卷引用:广西南宁市第三中学五象校区2024届高三下学期适应性考试数学试题
广西南宁市第三中学五象校区2024届高三下学期适应性考试数学试题山东省2022届高三第二次学业质量联合检测数学试题湖北省襄阳市第五中学2022届高三下学期适应性考试(二)数学试题2024年新高考Ⅰ卷浙大优学靶向精准模拟数学试题(六)湖南省长沙市第一中学2024届高考适应性演练(三)数学试题重庆市铁路中学校2021-2022学年高一下学期期中数学试题浙江省杭州市第十四中学2022-2023学年高三上学期9月练习(月考)数学试题辽宁省铁岭市清河高级中学2022-2023学年高二上学期10月月考数学试题重庆市南岸南坪中学校2022-2023学年高一下学期期中数学试题江西省宜春市上高二中2022-2023学年高二下学期3月月考数学试题
名校
解题方法
2 . 如图在多面体
中,
,
平面
,
为等边三角形,
,
,
,点
是
的中点.
(1)若点
是
的重心,证明:点
在平面
内;
(2)求二面角
的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0082d25fc347d093ca69e6e0992f6e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24b8173115f2297bc4c85bf7325fbef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f32a7f0fb3cc6eaa91ad3f44b9d5610.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/31/f853ff08-0c2c-4758-a721-e43630aa5438.png?resizew=173)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5bc0580c6c53d00438fcf63bcbc5179.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52702f8bf4bcccfc6da6f196dea918da.png)
您最近一年使用:0次
解题方法
3 . 已知四棱锥
中,底面
为直角梯形,
平面
,
,
,
,
,M为
中点,过C,D,M的平面截四棱锥
所得的截面为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/5/38a4abaf-0a39-4e83-ace1-0120f4ff5f14.png?resizew=155)
(1)若
与棱
交于点F,画出截面
,保留作图痕迹(不用说明理由),求点F的位置;
(2)求平面
与平面
所成锐二面角的余弦值.
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dceb5cc71fc50f20649f6b9535fd914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c2753753faf2cb9a0003aa8e3945159.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80137ee8af4684ce558242d8b3f1459.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/5/38a4abaf-0a39-4e83-ace1-0120f4ff5f14.png?resizew=155)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfe67036b4671b5d2a5c55b48c4d3bb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
名校
解题方法
4 . 已知四棱锥
中,底面
为直角梯形,
平面
,
,
,
,
,
为
中点,过
,
,
的平面截四棱锥
所得的截面为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/4/60d03f35-7a27-4a8e-95aa-6ad937654395.png?resizew=185)
(1)若
与棱
交于点
,画出截面
,保留作图痕迹(不用说明理由),并证明
.
(2)求多面体
的体积.
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c2753753faf2cb9a0003aa8e3945159.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80137ee8af4684ce558242d8b3f1459.png)
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/4/60d03f35-7a27-4a8e-95aa-6ad937654395.png?resizew=185)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1ead5e71d659442776937400b19e230.png)
(2)求多面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/673d35c60271a1f86876bf4005eee23c.png)
您最近一年使用:0次
2023-05-03更新
|
1093次组卷
|
4卷引用:广西邕衡金卷2023届高三一轮复习诊断性联考数学(文)试题
广西邕衡金卷2023届高三一轮复习诊断性联考数学(文)试题(已下线)高一数学下学期第二次月考01(范围:平面向量,解三角形,复数,立体几何)江西省新余市第一中学2022-2023学年高一下学期第二次月考数学试题(已下线)重难点6-2 空间几何体的交线与截面问题(8题型+满分技巧+限时检测)
5 . 如图所示,在四棱柱
中,底面
是等腰梯形,
,
,
,侧棱
⊥底面
且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/f44ca6e0-bf5d-4599-bfdf-ff928725ac24.png?resizew=173)
(1)指出棱
与平面
的交点
的位置(无需证明);
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff7ddbb49c644bf06ccbad885ba2c84a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7db886994f0a7ddfeb0fe2d7099d4498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb8781b3e04f90bde1fd8a96075ab932.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/161f651ef002ac85870d46b04347b54f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5493b3fbfbf3d2ec8c57fe228d8047cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/f44ca6e0-bf5d-4599-bfdf-ff928725ac24.png?resizew=173)
(1)指出棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbb16f7dbc4b9993c4efa0764df1d8ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69c66600644e8bdff1728bf2c7e5375.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252053b853152bd294a8315debd00b92.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da9dcf6c319174c9ea2b1ceaed1649a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69c66600644e8bdff1728bf2c7e5375.png)
您最近一年使用:0次
2022-10-19更新
|
475次组卷
|
3卷引用:广西2022届高三高考桂柳鸿图综合模拟金卷(2)数学(文)试题
名校
6 . 已知正方形ABCD中E为AB中点,H为AD中点,F,G分别为BC,CD上的点,
,
,将
沿着BD折起得到空间四边形
,则在翻折过程中,以下说法正确的是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f0ce7aaca2b6725dac7ed5d2a437aa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf9e1ac9b20514f7fe9d2e00c37edede.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b437890ba5c206ca3a62f47cc8fe9f2.png)
A.![]() | B.EF与GH相交 |
C.EF与GH异面 | D.EH与FG异面 |
您最近一年使用:0次
2022-04-21更新
|
1137次组卷
|
5卷引用:广西南宁市2022届高三高中毕业班第二次适应性测试数学(理)试题
解题方法
7 . 在四边形
中(如图1所示),
,
,
,将四边形
沿对角线
折成四面体
(如图2所示),使得
,E,F,G分别为棱
,
,
的中点,连接
,
,则下列结论错误的是( ).
![](https://img.xkw.com/dksih/QBM/2022/1/20/2898433360445440/2904440597577728/STEM/472f0eb7-4214-4d30-b2bb-8c1d65bef694.png?resizew=265)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e57723dd7cee485e3b52a07e79f7e5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aded98ab04075fff4137ba759bea793.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc84671fd0f27587260cdbcc31e6d483.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/761470c15708059de75093fd309e2cfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a21897349d3d7c94419692106887153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e663220a66eff19da6a71e46b397db2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://img.xkw.com/dksih/QBM/2022/1/20/2898433360445440/2904440597577728/STEM/472f0eb7-4214-4d30-b2bb-8c1d65bef694.png?resizew=265)
A.![]() | B.直线![]() ![]() ![]() |
C.C,E,F,G四点不共面 | D.四面体![]() ![]() |
您最近一年使用:0次
2022-01-28更新
|
1051次组卷
|
3卷引用:广西桂林市、梧州市2022届高三高考联合调研(一模)数学(理)试题
广西桂林市、梧州市2022届高三高考联合调研(一模)数学(理)试题陕西省2022届高三上学期元月联考理科数学试题(已下线)解密14 空间中的平行与垂直 (讲义)-【高频考点解密】2022年高考数学二轮复习讲义+分层训练(全国通用)
名校
8 . 设
表示平面,
表示直线,
表示三个不同的点,给出下列命题:
①若
,则
;
②若
表示不同的平面,
,则
;
③若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797dd454151557434b7b5e36da2c8a44.png)
④若
,则
与
重合.
其中,正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ed989cfcc8a18db907eb7d0a7d38bdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1754786a3367aca3da18ee3316e5b968.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ecab0ee88b5f0e7cbc34df27c7eaea1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74742135157ce66703f899d52748b78b.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f254563616183974bd78aedf04157922.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797dd454151557434b7b5e36da2c8a44.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/928d45c1533e810cfe8c3fadc6e07b4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
其中,正确的有( )
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次
2021-07-24更新
|
434次组卷
|
7卷引用:广西来宾市2020届高三4月教学质量诊断性联合考试数学(理)试题
广西来宾市2020届高三4月教学质量诊断性联合考试数学(理)试题福建省永春第一中学2020-2021学年高一下学期期中考试数学试题福建省永春第二中学2022-2023学年高一下学期5月月考数学试题(已下线)8.4.1平面(分层作业)-【上好课】(已下线)8.4.1 平面【第二课】“上好三节课,做好三套题“高中数学素养晋级之路(已下线)专题13.2平面的基本性质-重难点突破及混淆易错规避(苏教版2019必修第二册)(已下线)8.4空间点、直线、平面之间的位置关系——课堂例题
解题方法
9 . 已知正方体
的棱长为2,
分别为
的中点.
![](https://img.xkw.com/dksih/QBM/2021/3/9/2674139275198464/2677682265489408/STEM/1e7eb36395414108a4e9749b4856e6e6.png?resizew=260)
(1)画出平面
截正方体各个面所得的多边形,并说明多边形的形状和作图依据;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b199a99e53d67ff4abf233930961a29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e21de25a662ba9e513dee5d6e34cb237.png)
![](https://img.xkw.com/dksih/QBM/2021/3/9/2674139275198464/2677682265489408/STEM/1e7eb36395414108a4e9749b4856e6e6.png?resizew=260)
(1)画出平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe5cf7b987c8da3b08450400484db716.png)
您最近一年使用:0次
2021-03-14更新
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736次组卷
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4卷引用:广西桂林、崇左市2021届高三二模数学(理)试题
广西桂林、崇左市2021届高三二模数学(理)试题宁夏银川市贺兰县景博中学2021届高三下学期二模数(理)试题(已下线)专题36 仿真模拟卷04-2021年高考数学二轮复习热点题型精选精练(新高考地区专用)(已下线)精做04 立体几何-备战2021年高考数学(理)大题精做
解题方法
10 . 如图,在直三棱柱
中,点E、F在侧棱
、
上,且
,
,点D、G在侧棱
、
上,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/ae19c7da-030f-486b-80b4-c555fc718f9a.png?resizew=211)
(1)证明:点G在平面
内;
(2)若
,
,
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1acab2d6fecadbf4375936e8a2176540.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1890aa7b375e3a8f8f8a0f36cf5deca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7289ef8051c49b4089836bac6f70b4d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeb73061827c2685d3f7603485c120ea.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/ae19c7da-030f-486b-80b4-c555fc718f9a.png?resizew=211)
(1)证明:点G在平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebce46aeb97373353179e5669365fa4a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/883fc5e3faf39829d60804b59deb1730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e90c86be02bec7e9604c93233fd482de.png)
您最近一年使用:0次