解题方法
1 . 如图,把正方形纸片ACDB沿对角线BC折成直二面角,E,F,G,H分别为BD,BA,AC,CD的中点,O是原正方形ABCD的中心,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/ffae5813-08ee-4dce-b5e5-d69a9b382500.png?resizew=158)
(1)求证:.E,F,G,H共面.
(2)求EG的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ea52361458ce2e49ed0fe99d8e6c02.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/ffae5813-08ee-4dce-b5e5-d69a9b382500.png?resizew=158)
(1)求证:.E,F,G,H共面.
(2)求EG的长.
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名校
解题方法
2 . 如图,在长方体
中,点
、
分别在棱
,
上,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/28/7f429009-e7ae-4839-899c-c5ca5034a9a6.png?resizew=130)
(1)求证:
,
,
,
四点共面;
(2)若
,
,
,求平面
与平面
夹角的正弦值;
(3)在(2)的条件下,求点
到平面
的距离.
![](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/18f166fe0e3f4196b7a34c5ed309a597.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ce1f746c5da3cb8280f3a0b724a113f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/28/7f429009-e7ae-4839-899c-c5ca5034a9a6.png?resizew=130)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae8768996ca9a0f2c5d9a19abbd54df.png)
(3)在(2)的条件下,求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
您最近一年使用:0次
解题方法
3 . 如图,在正方体
中,
,
分别为
,
的中点.
平面
;
(2)求证:
;
(3)求证:
,
,
,
四点共面.
![](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/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fbafedc202bd0d86c4dfdece9f8f4fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81cd138921c73b4cd561adf3c5e1003b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc9e71a5b01119a28986d1b83fd39d87.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a778e0635e340c5dd443d8ba15f8470.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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名校
解题方法
4 . 如图,已知正方体
的棱长为
分别为
的中点.
满足
,求证
四点共面;
(2)求三棱柱
的表面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b684d2e78a0eb1b406913f2730e1d226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c69ed30e30ec2020f0778986a40902ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ff7efc4eabec461ef4ffa6b414992e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e22c2178bc89a9d1bc829f9cd5656d6a.png)
(2)求三棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a8e606dbef41fe3143be82957d18bc7.png)
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2023-08-16更新
|
357次组卷
|
6卷引用:专题08 立体几何大题常考题型归类-期末考点大串讲(人教B版2019必修第四册)
(已下线)专题08 立体几何大题常考题型归类-期末考点大串讲(人教B版2019必修第四册)四川省绵阳市南山中学实验学校2022-2023学年高一下学期5月月考数学试题(已下线)8.4.1 平面【第三课】“上好三节课,做好三套题“高中数学素养晋级之路(已下线)8.4.1 平面【第二练】“上好三节课,做好三套题“高中数学素养晋级之路(已下线)专题3.3空间点、直线、平面之间的位置关系-重难点突破及混淆易错规避(人教A版2019必修第二册)(已下线)第六章立体几何初步章末二十种常考题型归类(1)-【帮课堂】(北师大版2019必修第二册)
2023高一·全国·专题练习
5 . 如图所示,在空间四边形ABCD中,E,F分别为AB,AD的中点,G,H分别在BC,CD上,且
.求证:
(2)EG与HF的交点在直线AC上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e7868dd04f815616bd68fc54d8df0f.png)
(2)EG与HF的交点在直线AC上.
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2023-06-04更新
|
639次组卷
|
7卷引用:青海省西宁市2022-2023学年高一下学期期末调研测试数学试题
青海省西宁市2022-2023学年高一下学期期末调研测试数学试题(已下线)8.4 空间中点、直线、平面之间的位置关系(分层练习)-2022-2023学年高一数学同步精品课堂(人教A版2019必修第二册)(已下线)第02讲 空间点、直线、平面之间的位置关系(六大题型)(讲义)-1(已下线)考点5 共线与共面问题 2024届高考数学考点总动员【练】(已下线)第十三章 立体几何初步(压轴题专练)-单元速记·巧练(苏教版2019必修第二册)(已下线)11.3.1平行直线与异面直线-同步精品课堂(人教B版2019必修第四册)(已下线)第11章:立体几何初步章末综合检测卷(新题型)-【帮课堂】(人教B版2019必修第四册)
名校
6 . 如图,已知四棱锥
的底面
是平行四边形,
分别是棱
的中点,
是棱
上一点,且
.
![](https://img.xkw.com/dksih/QBM/2023/8/30/3313939602817024/3315480444698624/STEM/6a209b38ecad47ff938267058efac9da.png?resizew=270)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3171b3d11c6f4619e189677345357508.png)
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/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589c3cc1f331dbb2248b0829039df7f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c60746befbfdc2c315681d91898978.png)
![](https://img.xkw.com/dksih/QBM/2023/8/30/3313939602817024/3315480444698624/STEM/6a209b38ecad47ff938267058efac9da.png?resizew=270)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3171b3d11c6f4619e189677345357508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f35614aff055b98b76ca262f64e629d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c08ab5885eaff8d24fca1f1de998f18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
名校
解题方法
7 . 如图,在四棱锥
中,
平面
,底面
为直角梯形,
分别为棱
的中点,
.
(1)证明:
四点共面;
(2)求平面
与平面
的夹角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.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/9c44db1f13000a7a16ddb9887825dff0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a211a44ffb09c7413dac58e9cea70fd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa5460409c93cd968a6c9925532a3fbb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/7/3ba0b198-a543-4b9f-9822-0fe9f6354a3e.png?resizew=172)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fee39195c8b56b3d5b38a4f69a82d828.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20af148464904e21f4374cc8fb886fba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
您最近一年使用:0次
2023-07-05更新
|
571次组卷
|
5卷引用:河北省邯郸市2022-2023学年高二下学期期末考试数学试题
22-23高一下·湖北·期末
名校
解题方法
8 . 如图,在边长为2的正方体
中,
,
分别是棱
,
的中点,
(1)求证:点
在平面
内;
(2)用平面
截正方体
,将正方体分成两个几何体,两个几何体的体积分别为
,
,求
的值.
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/3/6976cdab-f8b0-4742-bd61-615e590974c9.png?resizew=152)
(1)求证:点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7850e88507969a07a9515347b97c7b6e.png)
(2)用平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7850e88507969a07a9515347b97c7b6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4764374bd2fb78e59cd0b283637baeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b46ad399287e0ce5010c06e068c32855.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30468054fb148d2f937a54fcc1d60f92.png)
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2023-07-01更新
|
734次组卷
|
3卷引用:湖北省新高考联考协作体2022-2023学年高一下学期期末联考数学试题
(已下线)湖北省新高考联考协作体2022-2023学年高一下学期期末联考数学试题湖北省孝感市重点高中2022-2023学年高一下学期期末联考数学试题安徽省定远中学2022-2023学年高一下学期6月阶段检测数学试卷(三)
解题方法
9 . 如图,在六面体
中,
,平面
菱形ABCD. 证明:
,
,D四点共面;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe28660a959bf7cf126a9dba040165f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0671b4776e142e17a79af5b3f0378ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28fff0f219639442392ef08c6489df93.png)
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2023-06-28更新
|
650次组卷
|
5卷引用:江苏省常州市教育学会2022-2023学年高二下学期期末数学试题
江苏省常州市教育学会2022-2023学年高二下学期期末数学试题(已下线)模块二 专题5《立体几何初步》单元检测篇 A基础卷 (苏教版)(已下线)考点巩固卷17 空间中的平行与垂直(八大考点)(已下线)考点5 共线与共面问题 2024届高考数学考点总动员【练】【江苏专用】专题09立体几何与空间向量(第一部分)-高二下学期名校期末好题汇编
名校
解题方法
10 . 图1是由矩形
、
和菱形
组成的一个平面图形,其中
,
,
.将其沿
,
折起使得
与
重合,连接
,如图2.
(1)证明:图2中的
,
,
,
四点共面,且平面
平面
;
(2)求图2中
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d498a0467ff3c577a7ed175d7bffd885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0da522aef3c452767df89b8d0eb62de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de93a4fa2069aed282b7a97a4b41afbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a02308f73ae93b7a077cea6f9bd1660.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/5/8674f3d0-6f2f-409f-8e72-e95e8c30916f.png?resizew=347)
(1)证明:图2中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/693cd6179b2a92f03153ce12a0e86b95.png)
(2)求图2中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3df0d9a6c83b35a863544a01f22ef7.png)
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