1 . 如图,在直三棱柱
中,
,
,
,
分别是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/23/07bf3ef9-d316-4a47-92af-3a01c7cd520c.png?resizew=128)
(1)求证:
;
(2)求平面
与平面
的夹角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca38004c7744a7567bef30f0674fe60f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97e89a358226b4be8786077a60555c69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1032baaea5d4f8cb731df30bf346145f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/23/07bf3ef9-d316-4a47-92af-3a01c7cd520c.png?resizew=128)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce9ebc509c57beab91d0833dba1b2c6.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f20d8e192f6a75017da742890f3d39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb9b291d954b73034070eefd881b8bce.png)
您最近一年使用:0次
2022-08-22更新
|
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4卷引用:贵州省贵阳市2023届高三上学期8月摸底考试数学(理)试题
2 . 长方体
中,
,
,
是上底面内的一点,经过点
在上底面内的一条直线
满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/4aebd301-b4d0-4af7-adc5-3ed6ee16d6f5.jpg?resizew=149)
(1)作出直线
,说明作法(不必说明理由);
(2)当
是
中点时,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d262480ffb55b7617f44b63f130c154a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba0c1611f2dc5ce8349b485bf6bf66ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/4aebd301-b4d0-4af7-adc5-3ed6ee16d6f5.jpg?resizew=149)
(1)作出直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46a4597684abe427acbc7936e5f35d0f.png)
您最近一年使用:0次
解题方法
3 . 如图,在长方体
中,
,
,
为棱
的中点.
![](https://img.xkw.com/dksih/QBM/2021/8/16/2787445061902336/2795482422845440/STEM/f44e8ea3614743438f04b9a4fcb2eb77.png?resizew=118)
(1)证明:
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829018a6ca0aff95d89e3f7cd943274e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41fd676c41d2d644928f014b0fea4689.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/2021/8/16/2787445061902336/2795482422845440/STEM/f44e8ea3614743438f04b9a4fcb2eb77.png?resizew=118)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662698361c6b3ddaf0c28a3c87be53e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02c4f474f2c144be8703517ef72b98a7.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37707eee5805c05fa2ec2884d614944b.png)
您最近一年使用:0次
2021-08-28更新
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181次组卷
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3卷引用:贵州省贵阳市五校(贵州省实验中学、贵阳二中、贵阳八中、贵阳九中、贵阳民中)2022届高三联合考试(一)数学(文)试题
贵州省贵阳市五校(贵州省实验中学、贵阳二中、贵阳八中、贵阳九中、贵阳民中)2022届高三联合考试(一)数学(文)试题(已下线)专题19 立体几何(解答题)-备战2022年高考数学(文)母题题源解密(全国甲卷)陕西省渭南市白水县2021-2022学年高一上学期期末数学试题
名校
解题方法
4 . 如图,在长方体
中,底面
是边长为1的正方形,且
,
为棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/abb74def-cbd3-4f72-b972-86fee4120a12.png?resizew=146)
(1)求证:
平面
;
(2)求点
到平面
的距离.
![](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/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/abb74def-cbd3-4f72-b972-86fee4120a12.png?resizew=146)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662698361c6b3ddaf0c28a3c87be53e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02c4f474f2c144be8703517ef72b98a7.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea30f82d0facef330183e01855f83b20.png)
您最近一年使用:0次
2021-08-27更新
|
240次组卷
|
2卷引用:贵州省贵阳市2021届高三8月摸底考试数学(文)试题
5 . 如图,正方体
的棱长为1,
,
分别是棱
,
的中点,过直线
的平面分别与棱
,
交于
,
.设
,
,给出以下四个结论:①平面
平面
; ②当且仅当
时,四边形
的面积最小; ③四边形
的周长
,
是单调函数;④四棱锥
的体积
在
上先减后增.其中正确命题的序号是__________ .
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.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/91f2a9b923a355694ea487f6c5669a04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3993391fe16e7315c4d92af28c03fa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c1f56858867e7b6becaeac49112a3d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2bf9ef324f1289e205e29fed105c38e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b650820d7bed48ed67a2869ad8c65ff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65e92eac740953aa383be636ea90fd47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65e92eac740953aa383be636ea90fd47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6122f45cc31e2b369bf4e87e69d4bdd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3993391fe16e7315c4d92af28c03fa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cb21d0d3f430f009b677eb8945323e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11dd9b6f0915bc2287ef8ccf6ad881ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3993391fe16e7315c4d92af28c03fa2.png)
![](https://img.xkw.com/dksih/QBM/2021/8/21/2790864399466496/2795399238778880/STEM/db8f2e8b-0899-4c4a-9839-750d543c7363.png?resizew=218)
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2021-08-27更新
|
737次组卷
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9卷引用:贵州省贵阳市五校(贵州省实验中学、贵阳二中、贵阳八中、贵阳九中、贵阳民中)2022届高三联合考试(一)数学(文)试题
贵州省贵阳市五校(贵州省实验中学、贵阳二中、贵阳八中、贵阳九中、贵阳民中)2022届高三联合考试(一)数学(文)试题贵州省贵阳市五校(贵州省实验中学、贵阳二中、贵阳八中、贵阳九中、贵阳民中)2022届高三联合考试(一)数学(理)试题江西省赣州市兴国县2021-2022学年高二上学期联考数学(理)试题安徽省名校联考2022届高三下学期教育教学质量监控理科数学试题重庆市育才中学2022届高三二诊模拟(一)数学试题四川省泸州市泸县第二中学2022届高三上学期第四学月考试数学(理)试题(已下线)重难点09五种空间向量与立体几何数学思想-1(已下线)思想03 运用函数与方程的思想方法解题(4大核心考点)(讲义)(已下线)第13章 立体几何初步 章末题型归纳总结 (2)-【帮课堂】(苏教版2019必修第二册)
解题方法
6 . 长方体
中,
,
,
是上底面内的一点,经过点
在上底面内的一条直线
满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/eba592b9-6a0b-4672-8935-50556b4ca007.png?resizew=152)
(1)作出直线
,说明作法(不必说明理由);
(2)当
是
中点时,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d262480ffb55b7617f44b63f130c154a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba0c1611f2dc5ce8349b485bf6bf66ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/eba592b9-6a0b-4672-8935-50556b4ca007.png?resizew=152)
(1)作出直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa10a579055042cd2a163e7fe80e934c.png)
您最近一年使用:0次
名校
7 . 如图,在四棱锥P-ABCD中,底面ABCD是菱形,PA=PD,∠DAB=60°.
![](https://img.xkw.com/dksih/QBM/2019/9/29/2301162601684992/2301246641479680/STEM/04dce26732d2451eb4decd71edad02d0.png?resizew=263)
(1)证明:AD⊥PB.
(2)若PB=
,AB=PA=2,求三棱锥P-BCD的体积.
![](https://img.xkw.com/dksih/QBM/2019/9/29/2301162601684992/2301246641479680/STEM/04dce26732d2451eb4decd71edad02d0.png?resizew=263)
(1)证明:AD⊥PB.
(2)若PB=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35361e76a7c85d1886728c8d0200b234.png)
您最近一年使用:0次
2019-09-29更新
|
677次组卷
|
4卷引用:2019年贵州省贵阳市高三8月摸底数学(文)试题