解题方法
1 . 如图,在四棱锥
中,
是边长为
的正三角形,
,
,
,
,
,
,
分别是线段
,
的中点.
![](https://img.xkw.com/dksih/QBM/2023/6/19/3262926012358656/3265263554142208/STEM/ccedb8586f83431dad4ae7d8522a0998.png?resizew=139)
(1)求证:
平面
;
(2)求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e29ed30f17b5944e4afc66ab1d5f7394.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40119815a7f913caa86bc5aa118fcf35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e056089ae36a2892cdc776c89d649294.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d74bc0e4660fd4670077fc7690a7252.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/300c4553b67118e29502c01fc3353e33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07c2c865e0d9b91778838bd8a3c1c7f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04be58ea6ca37a850422631eb3e994d9.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ffc7d1af9053b027cf9e726f5367.png)
![](https://img.xkw.com/dksih/QBM/2023/6/19/3262926012358656/3265263554142208/STEM/ccedb8586f83431dad4ae7d8522a0998.png?resizew=139)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dace90bcafd1fbf25f272b05c3875f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a03203dd5ac79dd8c6707e4340773359.png)
(2)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e29ed30f17b5944e4afc66ab1d5f7394.png)
您最近一年使用:0次
2 . 在如图所示的几何体中,底面
是正方形,四边形
是直角梯形,
,且四边形
底面
分别为
的中点,
.
(1)求证:平面
平面
;
(2)求多面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c9854839f8f7fe792cd83cf3aa8b093.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b137f02d1323fe46ce853f662542d2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e675e59fa66ecdf14ba695e5e649222.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0509a2de857dc2589a38686afbb1f6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a8a140610df89623519116d9e9697c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d15fff0370d17e3befc6e3299820d35.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/5/c028d64c-c99a-4927-b1a8-57419def5b7e.png?resizew=163)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de22059d7d80f24817235269e9bb1ffe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c9854839f8f7fe792cd83cf3aa8b093.png)
(2)求多面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bab155dd2cd44b7301963056f9b0444b.png)
您最近一年使用:0次
2023-06-22更新
|
623次组卷
|
5卷引用:河南省新郑市第一中学2024届高三上学期12月阶段测试数学试题
名校
解题方法
3 . 如图,在正四棱台
中,
,
,
,
为棱
,
的中点,棱
上存在一点
,使得
平面
.
;
(2)当正四棱台
的体积最大时,求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/439cf259dd6137aa31bb99244a04ddfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6db57eca2a7cbd91bc57372592580a76.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/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d560542b646924eaf577480ac73281b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeef9d70a40b75f5f5c7c1859b4b627.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f276ad76c075f4be32ad326d223cf3.png)
(2)当正四棱台
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeef9d70a40b75f5f5c7c1859b4b627.png)
您最近一年使用:0次
2023-06-06更新
|
1552次组卷
|
6卷引用:河南省创新发展联盟大联考2023届高三预测数学(理科)试题
河南省创新发展联盟大联考2023届高三预测数学(理科)试题重庆市万州第二高级中学2023届高三下学期5月月考数学试题(已下线)第05讲 空间向量及其应用(练习)(已下线)重难点突破06 立体几何解答题最全归纳总结(九大题型)-1(已下线)专题6-3立体几何大题综合归类-2(已下线)FHgkyldyjsx12
解题方法
4 . 如图1所示,在长方形
中,
,
是
的中点,将
沿
折起,使得
,如图2所示,在图2中.
(1)求证:
平面
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80f51c31583fea58fde645474d60b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f9fba8a4098c1a0515286eb8d616dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/804c0e2a375b5f4ff1c420532968efc3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/9/fb4892a5-9099-49ca-82df-4a38c3637b6e.png?resizew=315)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7767d492158189b23af332a8016ed37d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ddb7c2ca1b6bee86cb24fed02e40da2.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f239fbcc58fc15535db4b5084c4f7253.png)
您最近一年使用:0次
2023-06-06更新
|
1307次组卷
|
2卷引用:河南省开封市天成学校2023届高三文科数学试题
解题方法
5 . 已知直棱柱
的底面
为菱形,且
,点
为
的中点.
(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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b316a0f9fb1c5d83f91d9e3376f0320b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/4/abd7fa5f-99f2-4a16-a2c2-dd4b3de8a6a4.png?resizew=178)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31c34b18525831f3eda7bb90be0199b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf9628142422a4884bd59538da6d312.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e106d67ff8828b5fb9165de66ea28da7.png)
您最近一年使用:0次
解题方法
6 . 如图,在矩形
中,点
在边
上,且满足
,将
沿
向上翻折,使点
到点
的位置,构成四棱锥
.
(1)若点
在线段
上,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
平面
,试确定点
的位置;
(2)若
,求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3843e2d1d44688569cae5d304cfb18b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efeadd146662b5d8fe14a424138ef751.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/3/d1b1b34c-e7e6-4eff-ad68-dec53d8cf167.png?resizew=414)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e04f3bb93e264a556a59b5a50fd5a09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efeadd146662b5d8fe14a424138ef751.png)
您最近一年使用:0次
7 . 如图,在正三棱柱中,
为
上一点,
,
,
为
上一点,三棱锥
的体积为
.
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7b3e7c7845a0ec3cbac709fda131764.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a52848aff08399a36f217356007a4b.png)
您最近一年使用:0次
2023-05-27更新
|
1016次组卷
|
5卷引用:河南省郑州市九师联盟2023届高三考前押题卷文科数学试题
河南省郑州市九师联盟2023届高三考前押题卷文科数学试题河南省驻马店市2023届高三三模文科数学试题河南省开封市杞县等4地2022-2023学年高三下学期期末考试文科数学试题江西省南昌市部分学校2023届高三模拟考前押题模拟预测数学(文)试题(已下线)8.6.3平面与平面垂直 (第2课时) -【上好课】(人教A版2019必修第二册)
名校
解题方法
8 . 在直三棱柱
中,E为棱
上一点,
,
,D为棱
上一点.
(1)若
,且D为
靠近B的三等分点,求证:平面
平面
;
(2)若△ABC为等边三角形,且三棱锥
的体积为
,求二面角
的正弦值的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d62d95da5235c7fe783203d8f7c81b64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/28/f7ccf1dd-bc1a-48cf-954d-5f1e2a5138fc.png?resizew=130)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d89ba4036a5d18ec4abed44d7fd8e89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7b3e7c7845a0ec3cbac709fda131764.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
(2)若△ABC为等边三角形,且三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86f0c01cdd682431365cf43dfba98bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18483c9c195ecd922772527fa85c0fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/920afebdfaec5c13216348a34ac4b03e.png)
您最近一年使用:0次
2023-05-26更新
|
580次组卷
|
4卷引用:河南省郑州市九师联盟2023届高三考前预测押题理科数学试题
9 . 如图,在四棱锥
中,平面
平面
,四边形
是梯形,
,
,E,F分别是棱
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/13/51cf6779-e8e8-4211-a124-a95d977ff039.png?resizew=196)
(1)证明:
平面
.
(2)若
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.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/editorImg/2023/7/13/51cf6779-e8e8-4211-a124-a95d977ff039.png?resizew=196)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/917041e011865527a2830f0cff18050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
您最近一年使用:0次
2023-05-21更新
|
1552次组卷
|
5卷引用:河南省驻马店市2023届高三第二次联考文科数学试题
河南省驻马店市2023届高三第二次联考文科数学试题河南省创新发展联盟2023届高三高考仿真模拟预测文科数学试题四川省南江中学2023届高三下学期五月适应性考试(一)文科数学试题贵州省2023届高三多校联考数学(文)试题(已下线)第06讲 立体几何位置关系及距离专题期末高频考点题型秒杀
10 . 在几何体
中,
,
,点
,
在棱
上,且
,三棱柱
是直三棱柱.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/21/d63084b3-894d-4824-a99b-5375d1696322.png?resizew=201)
(1)求证:平面
平面
;
(2)若
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e45b0e1c3f6f5bc4cc81290bf263d90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0493e2e9841242128dd7e70ef256054d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83e307414348ab99a1145eb81ec83389.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/21/d63084b3-894d-4824-a99b-5375d1696322.png?resizew=201)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c44c1843ff6150ebc6aad3e34e477d2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd06851d747f8ccf046bc807b2523e65.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f8d3cdaca25c95e845d0041449cb80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a211ad5a06b505b8365a62c1946f3cb7.png)
您最近一年使用:0次
2023-05-20更新
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441次组卷
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2卷引用:河南省郑州市2023届高三下学期5月质量监测考试文科数学试题