解题方法
1 . 四棱锥
中,底面
是正方形,且
,平面
平面
,
,
(1)如图所示,若点
、
分别在线段
和
上,且满足
,
为线段
的中点,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cf2130848c57fdbb994e41f107329b3.png)
面
;
(2)如图所示,
,
是线段
上的两个动点,当二面角
的平面角大小等于45°时,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c753cb1eb73fd8d136d00462970797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd2b451d4fadd56658167db3c4f037c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa7fb4bb4caccf79639a126064771da5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0246970f221426ba16e6619a877e76c2.png)
(1)如图所示,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c8ed6c845e90e8add6e87da0ac47ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cf2130848c57fdbb994e41f107329b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0186c53c0f8b7aca010db4681fe90c15.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/14/3c7fa748-7d4d-4cdf-8a84-6b1f08d779a7.png?resizew=170)
(2)如图所示,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddbaa6fbcea867ebc00bfe48454d8d5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4452cdc95a45d4eb2456b47b3318ae1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/14/322ab5a7-326d-4096-bbb7-1e3306afe009.png?resizew=170)
您最近一年使用:0次
名校
解题方法
2 . 如图,在正方体
中,
为
的中点.
平面
;
(2)
上是否存在一点
,使得平面
平面
,若存在,请说明理由.
![](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://staticzujuan.xkw.com/quesimg/Upload/formula/0f11f1840eb8b17e7b07c3fe7e987a9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e2da608b66c9aee03e2503388ba4fd.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f88a05162ce6fae872f415e4581b83ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c241f900cb6ed341c137a3d71216a4.png)
您最近一年使用:0次
2024-03-16更新
|
4575次组卷
|
28卷引用:广西百色市2022-2023学年高一下学期数学期末考试模拟试题
广西百色市2022-2023学年高一下学期数学期末考试模拟试题广西壮族自治区河池市十校联体2023-2024学年高一下学期第二次联考(5月)数学试题湖南省长沙市第二十一中学2021-2022学年高一上学期期中数学试题山西省大同市第二中学校2021-2022学年高一下学期期中数学试题河南省商丘市宁陵县高级中学2021-2022学年高一下学期第二次月考数学试卷(B)(已下线)第47讲 直线与平面、平面与平面平行(已下线)8.5.3 平面与平面平行 (精讲)(1)-【精讲精练】2022-2023学年高一数学下学期同步精讲精练(人教A版2019必修第二册)(已下线)8.5.3 平面与平面平行(精讲)-【题型分类归纳】2022-2023学年高一数学同步讲与练(人教A版2019必修第二册)专题6.3 空间中的平行关系-2021-2022学年高一数学北师大版2019必修第二册陕西省西安市西北工业大学附属中学2022-2023学年高一下学期期中数学试题(已下线)第03讲 空间中平行、垂直问题10种常见考法归类(1)(已下线)第03讲 空间中平行、垂直问题10种常见考法归类(2)(已下线)10.4 平面与平面间的位置关系(第1课时)(七大题型)(分层练习)-2023-2024学年高二数学同步精品课堂(沪教版2020必修第三册)(已下线)考点巩固卷17 空间中的平行与垂直(八大考点)甘肃省兰州市兰州新区兰州新区高级中学2022-2023学年高一下学期期末数学试题(已下线)专题6-3立体几何大题综合归类-2(已下线)13.2.4 平面与平面的位置关系(1)-【帮课堂】(苏教版2019必修第二册)(已下线)高一下学期期中复习解答题压轴题十八大题型专练(2)-举一反三系列(人教A版2019必修第二册)河南省新乡市封丘县第一中学2023-2024学年高一下学期期中数学试题(已下线)专题19 平面与平面平行-《重难点题型·高分突破》(人教A版2019必修第二册)(已下线)8.5空间直线、平面的平行——随堂检测(已下线)专题05 空间直线﹑平面的平行-《知识解读·题型专练》(人教A版2019必修第二册)(已下线)8.5.3 平面与平面平行-同步题型分类归纳讲与练(人教A版2019必修第二册)广东省汕头市潮阳实验学校2023-2024学年高一下学期期中考试数学试题四川省攀枝花市第三高级中学2023-2024高一下学期第二次月考数学试题(已下线)6.4.2平面与平面平行-【帮课堂】(北师大版2019必修第二册)(已下线)专题突破:空间几何体的动点探究问题-同步题型分类归纳讲与练(人教A版2019必修第二册)(已下线)核心考点5 立体几何中的位置关系 B提升卷 (高一期末考试必考的10大核心考点)
名校
3 . 如图,四棱柱
的底面
是菱形,
平面
,
,
,
,点
为
的中点.
(1)求证:直线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
平面
;
(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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/24/6179c3d8-6224-400e-acd6-3e4ea8f92a47.png?resizew=135)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d56631ddece296d71607fc907b56d2a.png)
您最近一年使用:0次
2023-05-23更新
|
2617次组卷
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10卷引用:广西北海市2022-2023学年高一下学期期末质量检测数学试题
广西北海市2022-2023学年高一下学期期末质量检测数学试题吉林省普通高中友好学校第三十六届联合体2022-2023学年高一下学期期中联考数学试题(已下线)模块一 专题5 立体几何初步(3)(北师大版)(已下线)模块一 专题5 立体几何初步(3)(人教B)(已下线)模块一 专题3 立体几何初步(3)(人教A)(已下线)第04讲 利用几何法解决空间角和距离19种常见考法归类(3)陕西省宝鸡教育联盟2022-2023学年高一下学期7月期末联考数学试题(已下线)模块一 专题5 立体几何初步(3)(苏教版)宁夏石嘴山市平罗中学2022-2023学年高一下学期期末考试数学试题湖南省株洲市第二中学2021-2022学年高一下学期期中数学试题
名校
4 . 如图,四棱锥
中,底面
为菱形,
的中点为
,
的中点为
,且
平面
.
平面
;
(2)若
,
,
,求直线
与平面
所成角的正弦值.
![](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/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e126c16032892966489053f44b9048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c2b786c64e6a9ed2ec5670cde74f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9af29254fe60a392c249c5791279e9c8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/371853a703a8dafa6f8e942f46cb8706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4f5eec0addba78f2e0cdfb7ecc59a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
您最近一年使用:0次
2023-05-11更新
|
1324次组卷
|
3卷引用:广西玉林市博白县中学2022-2023学年高一下学期4月联考数学试题
广西玉林市博白县中学2022-2023学年高一下学期4月联考数学试题天津市英华实验学校2022-2023学年高一下学期第二次统练数学试题(已下线)第13章:立体几何初步 章末检测试卷-【题型分类归纳】
名校
解题方法
5 . 如图,在四棱锥
中,四边形
是等腰梯形,
.点
为棱
的中点,点
为棱
上的一点,且
,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/7/f97d15b3-4c23-4075-aa00-db939dc76256.png?resizew=196)
(1)证明:
平面
;
(2)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
平面
.
![](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/ce8fb8fe0ab08410e6976f53bbc3115a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34fede59cd1e8b8a467fac144321efd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a3fd5284e160896f07ce367645fd04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/7/f97d15b3-4c23-4075-aa00-db939dc76256.png?resizew=196)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)证明:
![](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/852aabd89edffc1b94344ff3f1f31ccd.png)
您最近一年使用:0次
2023-05-07更新
|
583次组卷
|
2卷引用:广西柳州高级中学、南宁市第二中学2023届高三联考数学(文)试题
6 . 如图,在
中,
,P为
边上一动点,
交
于点D,现将
沿
翻折至
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/12/8a9365f5-fd24-4bfb-a2e5-ef08bc02456b.png?resizew=166)
(1)
沿
翻折中是否会改变二面角
的大小,并说明理由;
(2)若
,E是
的中点.求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
平面
,并求当平面
平面
时四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b8f015217b0d485e6fd1da3802084c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac8fe4026f1a0745ab9aa9fe64f0e482.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4a237d3269ed2ebb073c5741c41915a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/12/8a9365f5-fd24-4bfb-a2e5-ef08bc02456b.png?resizew=166)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac8fe4026f1a0745ab9aa9fe64f0e482.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdcccbe157f2ff20e323716205096514.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36177d3114fd41fa976b7d2ae780f1a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58fb3f6c9c7adfd62c9802aecff8bdc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88d94f16de1e3952535f9c6cd2eae28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4864c21e9664fa9111ede6425b09563a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64abc0befb2318656cdacbb69e575693.png)
您最近一年使用:0次
2023-04-26更新
|
460次组卷
|
2卷引用:广西壮族自治区玉林市北流市实验中学2022-2023学年高一下学期5月月考数学试题
名校
解题方法
7 . 如图,在四棱锥
中,
是边长为1的正三角形,平面
平面
,
,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/22/de1b8752-f357-4381-9c25-9a1175d421d3.png?resizew=166)
(1)求证:
平面
;
(2)求
到平面
的距离
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e29ed30f17b5944e4afc66ab1d5f7394.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ed4c4e8edbd179f3fc38a6653f18c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9ab73fd4ddacc0c1524f8d742c7dcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1885efcff0b903e314057dd153578600.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d74bc0e4660fd4670077fc7690a7252.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e056089ae36a2892cdc776c89d649294.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/206890afe387969cbbc45cfc639fcbe6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/22/de1b8752-f357-4381-9c25-9a1175d421d3.png?resizew=166)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/002cc6a0373255f39172cdee62fb6b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ce50ba5e349425274f05d46d120a74.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
您最近一年使用:0次
2023-04-20更新
|
628次组卷
|
3卷引用:广西南宁市2023届高三二模数学(文)试题
8 . 如图,在四棱锥
中,
是边长为1的正三角形,面
面
,
,
,
,C为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/23/65dd729f-51ec-4fa3-b0b0-fb7bafbb16ec.png?resizew=164)
(1)求证:
平面
;
(2)线段
上是否存在点F,使二面角
的余弦值为
,若存在,求
.若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e29ed30f17b5944e4afc66ab1d5f7394.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ed4c4e8edbd179f3fc38a6653f18c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9ab73fd4ddacc0c1524f8d742c7dcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1885efcff0b903e314057dd153578600.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fec853fb315a3c7ce3699bc4ca0d74f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e056089ae36a2892cdc776c89d649294.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/206890afe387969cbbc45cfc639fcbe6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/23/65dd729f-51ec-4fa3-b0b0-fb7bafbb16ec.png?resizew=164)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08f8b463fcecf0a757f386db56e074d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ce50ba5e349425274f05d46d120a74.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04b09bf736f994785cbf62be5ac1b111.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1533d5d60816c28511bb4dadbd3c85a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
您最近一年使用:0次
名校
解题方法
9 . 已知四棱锥
中,底面ABCD为平行四边形,
底面ABCD,若
,
,E,F分别为
,
的重心.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/19/a7720b20-45ce-4f05-95dd-48d4c3c842cc.png?resizew=205)
(1)求证:
平面PBC;
(2)当
时,求平面PEF与平面PAD所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d6baf49925a5bcb359b542d45067c81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83a04565a8ebaa111894b724b0ba266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177678001b2ccde1db8f57fa5e017002.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/19/a7720b20-45ce-4f05-95dd-48d4c3c842cc.png?resizew=205)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2951b9f77413d5f062acb300b09de1f6.png)
您最近一年使用:0次
2023-04-16更新
|
808次组卷
|
5卷引用:广西梧州市苍梧中学2023届高三5月份高考数学模拟试题
10 . 如图,在四棱锥
中,平面
平面ABCD,
,
,点E在棱BF上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/11/c14ee36e-3f43-49c8-b43e-4ab66c5df451.png?resizew=141)
(1)求三棱锥
的体积;
(2)判断直线AE与平面DCF是否相交,如果相交,在图中画出交点H(不需要说明理由),并求出线段AH的长;如果不相交,求直线AE到平面DCF的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e5ba482836565abad208665cf7b9972.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf84ed033bd035c2fe7552badd5e447d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e6ccd0fffd8d1df432d99f86f9f4678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b9fa6f4dab63cb9d63a3330a0aba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7acb013aba6d3165c7512bd8b9957040.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/11/c14ee36e-3f43-49c8-b43e-4ab66c5df451.png?resizew=141)
(1)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/488eb032fffcac002d2c1877cc27c6cf.png)
(2)判断直线AE与平面DCF是否相交,如果相交,在图中画出交点H(不需要说明理由),并求出线段AH的长;如果不相交,求直线AE到平面DCF的距离.
您最近一年使用:0次
2023-04-10更新
|
470次组卷
|
4卷引用:广西桂林市、崇左市2023届高三一模数学(文)试题
广西桂林市、崇左市2023届高三一模数学(文)试题广西壮族自治区防城港市2023届高三下学期4月第三次联合调研数学(文)试题(已下线)专题13立体几何(解答题)(已下线)广东省佛山市2024届高三教学质量检测(一)数学试题变式题17-22