名校
解题方法
1 . 如图,已知四棱锥
中,底面
是平行四边形,
为侧棱
的中点.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6e2867f32d3f1c3cd36cd3a11a8580.png)
平面
;
(2)若
为侧棱
的中点,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](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/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6e2867f32d3f1c3cd36cd3a11a8580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/466fabcaac59132fea648ff35342ec9d.png)
(2)若
![](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/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d923a338dd2d2e29336b42574d38448.png)
您最近一年使用:0次
解题方法
2 . 如图,正方体
的棱长为3,点
在棱
上,点
在棱
上,
在棱
上,且
,
是棱
上一点.
,
,
,
四点共面;
(2)若平面
平面
,求证:
为
的中点.
(3)求平面
与平面
所成二面角的余弦值.
![](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/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22d8fd9dbd9c0967145625b394f8182f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e5ae0b183a311481b4c833959b068cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6069dc466eec75bbeb3d5c9b51cb3a70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
(3)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ef5ea43614d815c3abb27a42dfb101b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2024-06-17更新
|
136次组卷
|
2卷引用:海南省2020-2021学年高二下学期期末考试数学试题
3 . 如图所示正四棱锥
,
,
,
为侧棱
上的点,且
,求:
的表面积;
(2)若
为
的中点,求证:
平面
;
(3)侧棱
上是否存在一点
,使得
平面
.若存在,求
的值;若不存在,试说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f08faa7f1550cb3732de12b2be5fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/058695a1341735a4946257518067917a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/510cad489ea9604845d41a1795b2b7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/002a3b0ffc896755f903da63e3989576.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bee4299dd5fffb98f9c8b5c368c3504.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f08faa7f1550cb3732de12b2be5fe.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f15057403dfc0a732373b407f50e4137.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f696e763748cf6c5437f09f317d53e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/576cff1447fca473df4bf4a9245e44fb.png)
(3)侧棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5c9ca3af3eb8bc486f7b3f29f5065eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5258a6f9c63914b9e2ec95b6d39313b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27d39f37441ee55dbc8f1a6ca199a66b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ee29ea55624e5cbca858f47ef7ec49e.png)
您最近一年使用:0次
2024-04-15更新
|
3645次组卷
|
7卷引用:海南省海口市琼山华侨中学2023-2024学年高一下学期期中考试数学试卷
海南省海口市琼山华侨中学2023-2024学年高一下学期期中考试数学试卷辽宁省沈阳市东北育才学校双语校区2023-2024学年高二下学期4月自主测评数学试题(已下线)8.5.3 平面与平面平行【第二课】“上好三节课,做好三套题“高中数学素养晋级之路福建省晋江二中、奕聪中学、广海中学、泉港五中、马甲中学2023-2024学年高一下学期期中考试数学试题广东省湛江市第二十一中学2023-2024学年高一下学期期中考试数学试卷(已下线)专题3.5空间直线、平面的平行-重难点突破及混淆易错规避(人教A版2019必修第二册)吉林省长春外国语学校2023-2024学年高一下学期5月期中考试数学试题
名校
解题方法
4 . 如图,在四棱锥
中,底面
是平行四边形,
分别为
上的点,且
.
(1)证明:
平面
;
(2)若
平面
为
的中点,
,求二面角
的正切值.
![](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/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cac4ee9a98647379757a6f643fb73438.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c781fc002d462d7be259f2235f63a1f8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/28/657a9728-5e11-4395-a7fa-febb29aa5750.png?resizew=158)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d46554105150391e671609fc6348a18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9068f29d671d76d1e95ba3a4eaff5b96.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23d11e19c84255eb0431415c2dec553d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a633ce356e31adae2c0f1c4be3bbdfdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0baa2f1a925d67fcd406218b83015d13.png)
您最近一年使用:0次
2023-12-27更新
|
539次组卷
|
4卷引用:海南省海口市海口中学2024届高三上学期第四次月考数学试题
海南省海口市海口中学2024届高三上学期第四次月考数学试题(已下线)高二上学期数学期末模拟卷(二)-2023-2024学年高二数学同步精品课堂(北师大版2019选择性必修第一册)山西省山西大学附属中学校2024届高三下学期第一次月考数学试题(已下线)模块六 立体几何(测试)
名校
解题方法
5 . 如图,在多面体
中,平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
平面
,底面
是等腰直角三角形,
,侧面
是正方形,
平面
,且
,
.
(1)证明:
.
(2)若
是
的中点,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
平面
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c1c29b253c77a3c423af13abb8c7369.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb4957406b21df59fdf7fa184752287b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3df0d9a6c83b35a863544a01f22ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd654221ab95fe241d9e0202443f2609.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d02de6b8a69245c6398db2849683bb5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c8142ea086d6fd1100ff53f003d56d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/28/ce70a51e-9ca4-4e02-bc4b-c07ba31710be.png?resizew=139)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/206253f7380a831c07e3981cd44dd3fb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/616b46476c1f1d22e3a21d6fa33a3400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bb10d645970e5860afd3430957fab6c.png)
您最近一年使用:0次
2023-07-24更新
|
582次组卷
|
3卷引用:海南华侨中学2023届高三模拟(二)数学试题
名校
6 . 如图,C,D分别是以AB为直径的半圆O上的点,满足
,△PAB为等边三角形,且与半圆O所成二面角的大小为90°,E为PA的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/3a73e84a-27cb-4df4-a354-5424ece967b6.png?resizew=138)
(1)求证:DE//平面PBC;
(2)求二面角A-BE-D的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e925392d0bf25a1a5c698ec1d8adea4f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/3a73e84a-27cb-4df4-a354-5424ece967b6.png?resizew=138)
(1)求证:DE//平面PBC;
(2)求二面角A-BE-D的余弦值.
您最近一年使用:0次
2022-01-29更新
|
440次组卷
|
3卷引用:海南省洋浦中学2022-2023学年高二下学期期中数学试题
7 . 如图所示,在正方体
中,点
,
,
分别是
,
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/626882e7-1723-4d4e-b9ee-7c7e29e5a179.png?resizew=172)
(1)证明:
;
(2)求直线
与平面
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd694ad3a4733c7c84aaa7946aeea4de.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bebb9d0950db392cbe960641f648df2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/626882e7-1723-4d4e-b9ee-7c7e29e5a179.png?resizew=172)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e24617c8bcbc767b35047edf185c5e48.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc65c549059934e69355d8ecc245da57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c480d2b007fa8675efc646f91e256df2.png)
您最近一年使用:0次
8 . 如图所示,长方体
中,
,点
是棱
的中点,平面
与
交于点
.
![](https://img.xkw.com/dksih/QBM/2021/7/4/2756964626112512/2760008013012992/STEM/5129f068-b343-4e36-8363-59d669fe8a72.png?resizew=264)
(1)证明:
平面
;
(2)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a0771183d373c843d24c21ffa23e442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db3ef97d64e58d311019b70fe5e2cc0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2021/7/4/2756964626112512/2760008013012992/STEM/5129f068-b343-4e36-8363-59d669fe8a72.png?resizew=264)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f306ff6d237cd9d847aa109acf9333d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db3ef97d64e58d311019b70fe5e2cc0d.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db3ef97d64e58d311019b70fe5e2cc0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
19-20高二·浙江·期末
名校
9 . 如图所示四棱锥
中,
底面
,四边形
中,
,
,
,
,
为
的中点,
为
中点.
![](https://img.xkw.com/dksih/QBM/2020/3/5/2412911289155584/2412954668687360/STEM/a3dbb57fb4c84ffa84bec7b9146a0a4c.png?resizew=223)
(1)求证:
平面
;
(2)求直线
与平面
所成的角的正弦值.
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5acb763021bf166ca719d07223591d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81981fd7b343f4fe2db8f36eb66c1ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](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/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/2020/3/5/2412911289155584/2412954668687360/STEM/a3dbb57fb4c84ffa84bec7b9146a0a4c.png?resizew=223)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8ccd4181f956f6e0140bf0ab8f0716.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
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4卷引用:海南省三亚华侨学校(南新校区)2020-2021学年高二下学期开学考试数学试题