名校
解题方法
1 . 如图,直三棱柱
中,
,
分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/0829ff34-d1cc-41d8-92f1-842a40a18a02.png?resizew=130)
(1)证明:
平面
;
(2)若
,
,证明:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/0829ff34-d1cc-41d8-92f1-842a40a18a02.png?resizew=130)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd597851c0db4e4de4769e10e09383b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bca84ad86c648d3bb20c8909c8da3f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf6c80edb989cd755d5850d077b5de02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79c1acdd27cebb11e0266464b03b3afb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bca84ad86c648d3bb20c8909c8da3f.png)
您最近一年使用:0次
2021-08-19更新
|
830次组卷
|
7卷引用:江苏省苏州市常熟市2021-2022学年高二上学期暑期自主学习调查数学试题
江苏省苏州市常熟市2021-2022学年高二上学期暑期自主学习调查数学试题山东省青岛市胶州市2020-2021学年高一下学期期末数学试题福建省三明市第二中学2021-2022学年高一下学期阶段(二)考试数学试题广东省潮州市饶平县第二中学2021-2022学年高一下学期期中数学试题陕西省西安市大联考2022-2023学年高一下学期期中数学试题(已下线)期中模拟预测卷01(测试范围:必修二前三章)-【满分全攻略】2022-2023学年高一数学下学期核心考点+重难点讲练与测试(人教A版2019必修第二册)(已下线)期中模拟预测卷02(测试范围:必修二前三章)-【满分全攻略】2022-2023学年高一数学下学期核心考点+重难点讲练与测试(人教A版2019必修第二册)
解题方法
2 . 正方体
中,
为棱
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/73b6f2ac-c274-41ab-b8b1-7df26d74b002.png?resizew=146)
(1)求证:
平面
;
(2)求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/73b6f2ac-c274-41ab-b8b1-7df26d74b002.png?resizew=146)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f11f1840eb8b17e7b07c3fe7e987a9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e2da608b66c9aee03e2503388ba4fd.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08529daabff3c32b8321cd458757af42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e96946eaa2878fb8433eb2a97797a32b.png)
您最近一年使用:0次
3 . 如图,在四棱锥
中,底面ABCD是矩形,PA⊥PD,PA=PD,M,N分别为棱AB,PD的中点,二面角
的大小为60°,AB=3,BC=4
平面PBC﹔
(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/e63bd582eaabc123a637be558da88354.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b33b7213d99a817bff19bcf740a0697c.png)
您最近一年使用:0次
2021-08-07更新
|
470次组卷
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2卷引用:江苏省徐州市2020-2021学年高一下学期期末数学试题
名校
4 . 如图,在四棱锥
中,底面
为直角梯形,
,
,
,
,
为正三角形,点
,
分别在线段
和
上,且
.设二面角
为
,且
.
![](https://img.xkw.com/dksih/QBM/2021/6/24/2750004782448640/2781075118645248/STEM/7c97cefa-f451-4d48-b010-78c27ffe43f0.png?resizew=277)
(1)求证:
平面
;
(2)求直线
与平面
所成角的正弦值;
(3)求三棱锥
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/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4795ee1f96b430529934e2231b38885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f807fa55d6a411a31cd1c6bc8cffe59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.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/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c4e32e152097c2dfad9769da74680b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c911b404bbb8f8d5f1470585fa31ad97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39e49129bc80bb9b119c94d81deb177f.png)
![](https://img.xkw.com/dksih/QBM/2021/6/24/2750004782448640/2781075118645248/STEM/7c97cefa-f451-4d48-b010-78c27ffe43f0.png?resizew=277)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c19129982fd8389238b303e091bd94c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfaf581b4f42a25087f7eee23a7d66b6.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(3)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78c5822ecaac92df0e7e2562b5670df5.png)
您最近一年使用:0次
2021-08-07更新
|
1053次组卷
|
2卷引用:江苏省常州市2020-2021学年高一下学期期末数学试题
名校
解题方法
5 . 如图,在三棱柱
中,侧面
是矩形,侧面
是菱形,M、N分别是
、
的中点,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/429228f882da65a8e0064c88d02b8e40.png)
平面
;
(2)求证:
;
(3)若
,
是边长为4的正三角形,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/429228f882da65a8e0064c88d02b8e40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98faac7a82235d53bb4b6abe7ee54951.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98474425eb86a28f2b01cec95643ae7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcfc6016de043e3885dd8c28d62f219.png)
您最近一年使用:0次
2021-08-07更新
|
929次组卷
|
4卷引用:江苏省南京市“校际联合体”2020-2021学年高一下学期期末联考数学试题
名校
6 . 如图,四棱柱
的底面
是正方形,侧面
是菱形,
,平面
平面
,E,F分别为
的中点.
![](https://img.xkw.com/dksih/QBM/2021/6/30/2754370026708992/2780924596183040/STEM/763843d2b4d04dd5aa38826484664f35.png?resizew=284)
(1)求证:
平面
;
(2)求
与平面
所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b724168afaee2ecddf97257180be18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29e258e11926fe34920a67568cb9006a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b5f967c7a8bfdb1dc8c6addcced5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c243708359e1096b7162cbd338df9a6e.png)
![](https://img.xkw.com/dksih/QBM/2021/6/30/2754370026708992/2780924596183040/STEM/763843d2b4d04dd5aa38826484664f35.png?resizew=284)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2021-08-07更新
|
705次组卷
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5卷引用:江苏省苏州市2020-2021学年高一下学期学业质量阳光指标调研卷数学试题
名校
7 . 中国古代数学名著《九章算术》中记载:“刍(chú)甍(méng)者,下有袤有广,而上有袤无广.刍,草也.甍,屋盖也.”翻译为“底面有长有宽为矩形,顶部只有长没有宽为一条楼.刍字面意思为茅草屋顶.”现有一个刍如图所示,四边形
为正方形,四边形
,
为两个全等的等腰梯形,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/238e84b4-88c0-4282-a641-a67cc1a965d4.png?resizew=181)
(1)求二面角
的大小;
(2)求三棱锥
的体积;
(3)点
在直线
上,满足
(
),在直线
上是否存在点
,使
平面
?若存在,求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41d3f7d55fcbaebc4e2450ac63a3dc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed6034301fc4110da89bdb0f46ad82ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/510b162030e04fab26e05fe268675c07.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/238e84b4-88c0-4282-a641-a67cc1a965d4.png?resizew=181)
(1)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a34e44c5d7e1d22521fb293994f5b0.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b635e62c3b1f4a57feac8d22be84ee.png)
(3)点
![](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/885f6c143bd3b2f9860d94b969b3c5da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe9e329f2730b2be926b121f1ae04c0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a46435220a682a6f67d7ac8608be1c7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc46688d8723cf2003fc25890265200.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7081090993015b5058f60ca45af968ae.png)
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2021-08-02更新
|
849次组卷
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8卷引用:专题02 立体几何中存在性问题的向量解法-【重难点突破】2021-2022学年高二数学上册常考题专练(人教A版2019选择性必修第一册)
(已下线)专题02 立体几何中存在性问题的向量解法-【重难点突破】2021-2022学年高二数学上册常考题专练(人教A版2019选择性必修第一册)山东省济南市2020-2021学年高一下学期期末数学试题上海市控江中学2021-2022学年高二上学期期中数学试题上海市市西中学2022-2023学年高二上学期期中数学试题(已下线)第04讲线线、线面、面面平行的判定与性质(核心考点讲与练)(3)上海市文来高中2022-2023学年高一上学期期中数学试题(已下线)高一下学期期末真题精选(压轴60题20个考点专练)-【满分全攻略】2022-2023学年高一数学下学期核心考点+重难点讲练与测试(人教A版2019必修第二册)(已下线)第一章 空间向量与立体几何(压轴必刷30题4种题型专项训练)-【满分全攻略】2023-2024学年高二数学同步讲义全优学案(人教A版2019选择性必修第一册)
8 . 设
,
是两条不同的直线,
,
是两个不同的平面,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
A.若![]() ![]() ![]() |
B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() |
D.若![]() ![]() ![]() |
您最近一年使用:0次
2021-07-31更新
|
692次组卷
|
6卷引用:江苏省无锡市天一中学2020-2021学年高一(平行班)下学期期末数学试题
名校
9 . 如图,已知正方体ABCD—A1B1C1D1的棱长为2,则下列四个结论正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/7019ef37-81d9-49ef-b1b5-1ee685b83064.png?resizew=156)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/7019ef37-81d9-49ef-b1b5-1ee685b83064.png?resizew=156)
A.直线A1C1与AD1为异面直线 |
B.![]() |
C.正方体的外接球的表面积为12![]() |
D.三棱锥D1—ADC的体积为![]() |
您最近一年使用:0次
2021-07-25更新
|
812次组卷
|
4卷引用:江苏省无锡市太湖高级中学2020-2021学年高一下学期期中数学试题
名校
解题方法
10 . 如图,在直三棱柱ABC—A1B1C1中,点M,N分别为线段
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/1706d601-880a-4cb6-a25e-a38e9c1dfa63.png?resizew=139)
(1)求证:
平面
;
(2)若D在棱BC上,DN
平面ABB1A1,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/1706d601-880a-4cb6-a25e-a38e9c1dfa63.png?resizew=139)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
(2)若D在棱BC上,DN
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de7219026fd98e1c564f20bd0416d909.png)
您最近一年使用:0次