名校
1 . 如图,四边形
为菱形,
,将
沿
折起,得到三棱锥
,点M,N分别为
和
的重心.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/15/532c4dbc-6d2b-450b-a7b4-3af6a6222db2.png?resizew=296)
(1)证明:
∥平面
;
(2)当三棱锥
的体积最大时,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f9b0e2a09c7cddb40cea36cbade9b0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/15/532c4dbc-6d2b-450b-a7b4-3af6a6222db2.png?resizew=296)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212a67f115d1cbe69f100b489babe5f8.png)
(2)当三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6230ec526fcab9f2e73901cca0a5a5f0.png)
您最近一年使用:0次
2022-06-14更新
|
791次组卷
|
6卷引用:新疆维吾尔自治区乌鲁木齐市第101中学2024届高三上学期8月月考数学(理)试题
新疆维吾尔自治区乌鲁木齐市第101中学2024届高三上学期8月月考数学(理)试题福建省三明市第一中学2022届高三5月质量检测数学试题河南省濮阳市第一高级中学2021-2022学年高三上学期第一次质量检测理科数学试题(已下线)第4讲 空间向量的应用 (3)(已下线)第07讲 空间向量的应用 (2)理科数学-【名校面对面】河南省三甲名校2023届高三校内模拟试题(六)
2 . 已知三棱锥D-ABC,△ABC与△ABD都是等边三角形,AB=2.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/29/436adf57-234a-4e1b-a7ff-b7bb68f5ccb6.png?resizew=145)
(1)若
,求证:平面ABC⊥平面ABD;
(2)若AD⊥BC,求三棱锥D-ABC的体积.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/29/436adf57-234a-4e1b-a7ff-b7bb68f5ccb6.png?resizew=145)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18834f4ba51bf4d490f35ed02379fec7.png)
(2)若AD⊥BC,求三棱锥D-ABC的体积.
您最近一年使用:0次
2022-03-11更新
|
1217次组卷
|
6卷引用:新疆塔城市第三中学2022-2023学年高二上学期期中数学试题
新疆塔城市第三中学2022-2023学年高二上学期期中数学试题贵州省贵阳市2022届高三适应性监测考试(一)数学(文)试题高考广西桂林、崇左市2022届高三5月联合模拟考试数学(文)试题(已下线)第8.6讲 空间直线、平面的垂直-2021-2022学年高一数学链接教材精准变式练(人教A版2019必修第二册)广东省揭阳市惠来县第一中学2021-2022学年高一下学期第二次阶段考数学试题陕西省部分学校2024届高三下学期高考仿真模拟(一)文科数学试题(全国卷)
名校
解题方法
3 . 如图,四面体
中,
,
,
,E为AC的中点,且平面
平面
,若
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/5ea340a5-a3ad-445d-b869-e142fc47f8de.png?resizew=176)
(1)证明:
;
(2)点
在
上,当
的面积最小时,求
与平面
所成的角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd95dc30c0344788b94289c464a3158e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2aca1bdb9459855415e292e73de50ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8ff58f671a287701011a1b31e67e28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c646c683fbe522edb7ea54fd3ad873d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/5ea340a5-a3ad-445d-b869-e142fc47f8de.png?resizew=176)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36691f0269294ecae8f00b7bce97756c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
4 . 在四棱锥
中,底面
为直角梯形,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d08ca43007ef2c1a5da2f626fd30f7.png)
,
,
,
分别为
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/91974509-937b-41fd-a9cc-ba99fcfc46c1.png?resizew=166)
(1)证明:平面
平面
;
(2)若
与
所成角为
,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/47d08ca43007ef2c1a5da2f626fd30f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4795ee1f96b430529934e2231b38885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639bec6242a4b3f7bfb4b7033a67328c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62974d34de3a12418d6b700420afd1b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a373959bb9026f8a09845c0b828bf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9519318891fcc30de4856a38b4f0718d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9829fc6685b59fdc609f32f30ebd9e6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/91974509-937b-41fd-a9cc-ba99fcfc46c1.png?resizew=166)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b8e86809187e2c5d6e269d951d5f190.png)
您最近一年使用:0次
2022-05-26更新
|
920次组卷
|
5卷引用:新疆克拉玛依市2022届高三下学期第三次模拟检测数学(文)试题
新疆克拉玛依市2022届高三下学期第三次模拟检测数学(文)试题(已下线)2022年全国高考乙卷数学(文)试题变式题9-12题(已下线)第12练 空间直线、平面的垂直-2022年【暑假分层作业】高一数学(人教A版2019必修第二册)(已下线)2022年全国高考乙卷数学(文)试题变式题17-20题重庆市杨家坪中学2023-2024学年高二上学期九月测试数学试题
名校
5 . 如图所示,在多面体BC-ADE中,△ADE为正三角形,平面
平面ADE,且
,∠BAD=60°,∠CDA=30°,AB=BC=2.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/6435a433-0107-4a55-8dd0-4683b3b9feac.png?resizew=186)
(1)求证:AD⊥CE;
(2)求直线CD与平面BCE所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a755edadca4e4fc27fd49559b8d691ee.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/6435a433-0107-4a55-8dd0-4683b3b9feac.png?resizew=186)
(1)求证:AD⊥CE;
(2)求直线CD与平面BCE所成角的正弦值.
您最近一年使用:0次
2022-02-18更新
|
379次组卷
|
3卷引用:新疆喀什地区疏附县2022届高三第一次高考模拟考试数学试题
名校
6 . 如图.正方体
中,棱长为1,
![](https://img.xkw.com/dksih/QBM/2022/5/1/2970038011789312/2977235252658176/STEM/337db3f7-6c0b-4ee9-be15-c3cedda32b86.png?resizew=160)
(1)求证:AC⊥平面
;
(2)求二面角
的平面角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/2022/5/1/2970038011789312/2977235252658176/STEM/337db3f7-6c0b-4ee9-be15-c3cedda32b86.png?resizew=160)
(1)求证:AC⊥平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e96946eaa2878fb8433eb2a97797a32b.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3fec4fba64d1631538fb9da2c846e23.png)
您最近一年使用:0次
2022-05-11更新
|
1667次组卷
|
5卷引用:新疆克拉玛依市高级中学2021-2022学年高一年级 5 月月考数学试题
新疆克拉玛依市高级中学2021-2022学年高一年级 5 月月考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(已下线)第04讲 空间直线、平面的垂直 (练)黑龙江哈尔滨工业大学附属中学校2021—2022学年高二下学期月考数学试题(理)(已下线)8.6.3平面与平面垂直(第1课时平面与平面垂直的判定定理)(精讲)(2)-【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)
名校
解题方法
7 . 如图1.菱形
中,
于
.将
沿
翻折到
,使
,如图2.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/7/5d0fb100-7848-4993-9fc9-70cc43297560.png?resizew=331)
(1)求证:
平面
;
(2)求三棱锥
的体积;
(3)在线段
上是否存在一点
,使![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
平面
?若存在,求
的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf6fd74b836f4eb745bf65985968fd5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c771a4feb150ad9cff8d70431c97eb17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e92fed536087a6c2e8c44296b81a1d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1b48da67abdfa3f88dfb1819d3e2c8b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/7/5d0fb100-7848-4993-9fc9-70cc43297560.png?resizew=331)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1ddf0588b6b7c868afba00bb869f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29da86c7f889f8937f016346639f6abc.png)
(3)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a21897349d3d7c94419692106887153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/719103f93166bab4828257608e641a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b49c72aaf0bf6870e459b851eeef7e9.png)
您最近一年使用:0次
名校
解题方法
8 . 如图,在四棱锥
中,底面
是边长为2的菱形,
,
底面
,
,M为
的中点,N为
的中点.
![](https://img.xkw.com/dksih/QBM/2022/5/11/2977146780147712/2978751916236800/STEM/f8cb182459f74f4d97dca7a403e06c5e.png?resizew=211)
(1)证明:
;
(2)求点B到平面
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/2b96fac11d72f72c805dbddb8da72d68.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/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2022/5/11/2977146780147712/2978751916236800/STEM/f8cb182459f74f4d97dca7a403e06c5e.png?resizew=211)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67662c47e2dfa08001a62fa17320f477.png)
(2)求点B到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2022-05-13更新
|
298次组卷
|
3卷引用:新疆维吾尔自治区普通高考2022届高三第三次适应性检测数学(文)试题
新疆维吾尔自治区普通高考2022届高三第三次适应性检测数学(文)试题新疆维吾尔自治区乌鲁木齐市第十二中学2024届高三上学期11月月考数学试题(已下线)广西柳州铁一中学2021-2022学年高一5月月考数学试题
名校
解题方法
9 . 在四棱锥
中,底面
为直角梯形,
,E为
的中点,点P在平面
内的投影F恰好在直线
上.
![](https://img.xkw.com/dksih/QBM/2022/5/8/2975169770020864/2975787149991936/STEM/06e16c95-d363-4dab-9ed9-8a068904d0f2.png?resizew=179)
(1)证明:
.
(2)求点B到平面
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/2cefd90d94e2b2c3d8c3fc8b169466a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/2022/5/8/2975169770020864/2975787149991936/STEM/06e16c95-d363-4dab-9ed9-8a068904d0f2.png?resizew=179)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0910601e7d760188d10beee6a48f2ac.png)
(2)求点B到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
您最近一年使用:0次
2022-05-09更新
|
811次组卷
|
8卷引用:新疆博乐市高级中学2021-2022学年高三下学期文科数学试题
10 . 如图,矩形ABCD中,
,
,将
沿AC折起,使得点D到达点P的位置,
.
![](https://img.xkw.com/dksih/QBM/2022/3/22/2941756912656384/2942904573362176/STEM/76049de7-b16c-4e3d-b614-f6e4efa337eb.png?resizew=465)
(1)证明:平面
平面ABC;
(2)求直线PC与平面ABC所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08aa6fd52f3933cbded9ce8c880b4a10.png)
![](https://img.xkw.com/dksih/QBM/2022/3/22/2941756912656384/2942904573362176/STEM/76049de7-b16c-4e3d-b614-f6e4efa337eb.png?resizew=465)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
(2)求直线PC与平面ABC所成角的正弦值.
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2022-03-24更新
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1805次组卷
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4卷引用:新疆维吾尔自治区塔城地区沙湾县第一中学2021-2022学年高一下学期期末考试数学(理)试题