名校
解题方法
1 . 如图,在棱长为2的正方体
中,
是
的中点,点
是侧面
上的动点,且
截面
,则线段
长度的取值范围是( ).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/16/ae0957b8-56b2-46c8-a317-de7fccde4b98.png?resizew=171)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b724168afaee2ecddf97257180be18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7497623eab061f5d58638043b492a5e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a211ad5a06b505b8365a62c1946f3cb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438f34bc8b04e8c494b91306ac6fe352.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/16/ae0957b8-56b2-46c8-a317-de7fccde4b98.png?resizew=171)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-03-19更新
|
2509次组卷
|
11卷引用:重庆市乌江新高考协作体2024届高三上学期期中数学试题
重庆市乌江新高考协作体2024届高三上学期期中数学试题福建省泉州市泉港区第一中学2019-2020学年高二上学期第二次月考数学试题江西省南昌市第二中学2019-2020学年高二下学期第一次月考数学(文)试题(已下线)【新教材精创】11.3.3平面与平面平行(第2课时)练习(1)(已下线)8.5空间直线、平面的平行(精炼)-2020-2021学年高一数学一隅三反系列(人教A版2019必修第二册)湖北省武汉市华师一附中2020-2021学年高二上学期期中数学试题(已下线)2.2.3 直线与平面平行的性质-2020-2021学年高一数学课时同步练(人教A版必修2)新疆喀什第六中学2022届高三12月月考数学试题黑龙江省大庆市大庆实验中学2021-2022学年高一下学期期中数学试题(已下线)重难点09五种空间向量与立体几何数学思想-2(已下线)8.5空间直线、平面的平行——课后作业(提升版)
名校
2 . 已知正方体
的棱长为
,点
分别棱楼
的中点,下列结论中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/72782c69-c1f9-4773-bd10-8583f25d22da.png?resizew=199)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b199a99e53d67ff4abf233930961a29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/029ed096f249bfec4420d746e9a3d292.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/72782c69-c1f9-4773-bd10-8583f25d22da.png?resizew=199)
A.四面体![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.异面直线![]() ![]() ![]() |
您最近一年使用:0次
2020-03-15更新
|
1830次组卷
|
6卷引用:重庆十八中两江实验中学2020-2021学年高二上学期12月月考数学试题
3 . 在四棱锥
中,平面
平面
,
为等边三角形,
,
,
,点
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/f1f9fdb1-7d4d-43a6-9769-373ae2e7ad05.png?resizew=226)
(1)求证:
平面
;
(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/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e2903ff33266528a7902ad51cf8d75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c313dff515240bc75d42f6687ac44cb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/f1f9fdb1-7d4d-43a6-9769-373ae2e7ad05.png?resizew=226)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d8d90d123fec1ae1b7b30dac9f88e05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715cc9ea5e7d80930284ffb117142770.png)
您最近一年使用:0次
2020-02-09更新
|
868次组卷
|
6卷引用:重庆市礼嘉中学2021-2022学年高二上学期第三次(12月)月考数学试题
名校
4 . 如图在长方体
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52c8e65f505000cae31cbbb7b897bd7d.png)
分别是
棱的中点,
是底面
内一个动点,若
平面
,则
面积最小值为 ( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/c5f1986f-9f4b-4527-a8f3-4f23cfd4a42c.png?resizew=249)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52c8e65f505000cae31cbbb7b897bd7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b199a99e53d67ff4abf233930961a29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e21de25a662ba9e513dee5d6e34cb237.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff55f4780bb3fb376c9a04dbfbb1d989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bdb1ae2cd2fb4a5c842ebcaffab629b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/c5f1986f-9f4b-4527-a8f3-4f23cfd4a42c.png?resizew=249)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-01-17更新
|
1783次组卷
|
7卷引用:2019年重庆市三模数学理科试题
2019年重庆市三模数学理科试题2020届重庆市高三三诊数学(文)试题【市级联考】河南省郑州市2019年高三第二次质量检测数学(文)试题河南省郑州市第一中学2019-2020学年高三上学期12月月考数学(理)试题(已下线)2020届高三12月第03期(考点07)(文科)-《新题速递·数学》(已下线)2020届高三12月第03期(考点07)(理科)-《新题速递·数学》(已下线)考点02线面平行与垂直-2022年高考数学(文)一轮复习小题多维练(全国通用)
5 . 如图,已知三棱锥A-BPC中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d4c90c6fad9e3fff5268f7419583677.png)
,M为AB的中点,D为PB的中点,且
为正三角形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/06f4a064-2cdf-49c6-a8a1-6309e0e929e3.png?resizew=161)
(1)求证:
平面APC;
(2)若
,
,求三棱锥D-BCM的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d4c90c6fad9e3fff5268f7419583677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cbfbedd45e9f0b994bfcd51e0376fc3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/06f4a064-2cdf-49c6-a8a1-6309e0e929e3.png?resizew=161)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf1d2c64950a4ae3c7d2a7cbfdeddd3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
您最近一年使用:0次
6 . 如图,在多面体ABD﹣A1B1C1D1中四边形A1B1C1D1,ADD1A1.ABB1A1均为正方形.点M是BD的中点.点H在线段C1M上,且A1H与平面ABD所成角的正弦值为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/eeabe1cc-469a-4a81-a545-7c4c51b711ca.png?resizew=172)
(Ⅰ)证明:B1D1∥平面BC1D:
(Ⅱ)求二面角A﹣A1H﹣B的的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9da5bcfeb126e65be2c57e2b1565f5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/eeabe1cc-469a-4a81-a545-7c4c51b711ca.png?resizew=172)
(Ⅰ)证明:B1D1∥平面BC1D:
(Ⅱ)求二面角A﹣A1H﹣B的的正弦值.
您最近一年使用:0次
7 . 已知四棱柱
的底面为菱形,
,
,
,
平面
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/324a68eb-6832-4cc9-83ab-c08c392ff6ea.png?resizew=204)
(1)证明:
平面
;
(2)求钝二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92105835f8075cb75dff244e908370b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb8fb552b9e21dbaba74d11aa747790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a23f01af749100e1888bba06268843db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce03b310edce42191f9fa75a1c909ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd6edf5b50fea3628f602f397ceafcd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/324a68eb-6832-4cc9-83ab-c08c392ff6ea.png?resizew=204)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/547a4b438e2e6687c7cd55ea08bbaae2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
(2)求钝二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/104bf24922707215be95a860cd533940.png)
您最近一年使用:0次
2019-12-27更新
|
1450次组卷
|
9卷引用:重庆市荣昌中学2023-2024学年高二上学期第一次月考数学试题
重庆市荣昌中学2023-2024学年高二上学期第一次月考数学试题山东省九校2019-2020学年高三上学期12月检测数学试题(已下线)卷07-备战2020年新高考数学自学检测黄金10卷-《2020年新高考政策解读与配套资源》(已下线)专题15 运用空间向量研究立体几何问题-2021年高考数学二轮优化提升专题训练(新高考地区专用)【学科网名师堂】浙江省2021届高三高考数学预测卷(一)新疆乌鲁木齐市第八中学2020-2021学年高二下学期第一阶段考试数学(理)试题(已下线)专题23 盘点空间面面角的问题——备战2022年高考数学二轮复习常考点专题突破福建省泉州第一中学2021-2022学年高二上学期期中考试数学试题山东省东营市第一中学2022-2023学年高三上学期期末数学试题
8 . 如图甲所示,
是梯形
的高,
,
,
,先将梯形
沿
折起如图乙所示的四棱锥
,使得
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/bfde3124-b971-4491-9a73-28a63263d43a.png?resizew=389)
(1)在棱
上是否存在一点
,使得
平面
?若存在,请求出
的值,若不存在,请说明理由;
(2)点
是线段
上一动点,当直线
与
所成的角最小时,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0ce06dbe9e1177468781ba4aff85ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd848c7f05fde2189f96808930f62d9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/469bec78d9c4c484555b1c31b05101e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b744576b325f894cc71ffa1aa4d38b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9641d01140939c44450bf39773272af6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/bfde3124-b971-4491-9a73-28a63263d43a.png?resizew=389)
(1)在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94270844f197d524bf1da4f1385befd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a44cd09d9ad46264de4620c60370d49d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1e52b5625cff6fc8c5e150dd02a6e4b.png)
您最近一年使用:0次
解题方法
9 . 如图所示的四棱锥
中,
,
,
,
,
,
分别是
与
的重心.
![](https://img.xkw.com/dksih/QBM/2016/7/5/1572885667979264/1572885673934848/STEM/12e30df012e7479bb1dcfc022da1fa73.png?resizew=156)
(I)证明:
平面
;
(II)若三棱锥
的体积为
,证明:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb4957406b21df59fdf7fa184752287b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84cdd9a92d88085dc98c9a6915f93826.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cd5c4f8b106d01e0e431078e1a468b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.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/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177678001b2ccde1db8f57fa5e017002.png)
![](https://img.xkw.com/dksih/QBM/2016/7/5/1572885667979264/1572885673934848/STEM/12e30df012e7479bb1dcfc022da1fa73.png?resizew=156)
(I)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(II)若三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b69dd5d0374760007f4ec707a6723e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a20d37ff04d869d2709c7ae40f9d66e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
10 . 在四棱锥
中,底面
是边长为
的菱形,
,
面
,
,
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/2015/11/27/1572323071377408/1572323077537792/STEM/3a042bc5-7931-46cc-86e5-7dc40d3213b4.png?resizew=178)
(1)求证:
面
;
(2)求二面角
的大小的正弦值;
(3)求点
到面
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/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6906f59d09ce31956d6f5ea2b23fc77.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/8fd3eb538f36e6e722e4ce125266b99b.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://img.xkw.com/dksih/QBM/2015/11/27/1572323071377408/1572323077537792/STEM/3a042bc5-7931-46cc-86e5-7dc40d3213b4.png?resizew=178)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9d32e76582bf550593fdef53e081225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37793a3a810e823e10c340986f55ddd.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b55ff480a3858ee4f59f8781fc71c07.png)
(3)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37793a3a810e823e10c340986f55ddd.png)
您最近一年使用:0次
2016-12-03更新
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2164次组卷
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7卷引用:重庆市缙云教育联盟2022-2023学年高一下学期期末数学试题