1 . 上海中心大厦是上海市的地标建筑,现为中国第一高楼.为有效减少建筑所受的风荷载,通常对建筑体型进行一定的扭转.上海中心大厦的主楼可近似看成将正三棱柱的一个底面扭转所得的几何体;将正三棱柱
的底面
在其所在平面内绕
的中心逆时针旋转
得到
,再分别连接
、
、
、
、
、
所得的几何体.已知大厦的主楼高度约为
米,底层面积(即
的面积)约为
平方米.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/31/fdf3aa87-7bc9-4fc4-a1b2-d692595b7966.png?resizew=149)
(1)求证:
;
(2)试分别以正三棱柱
和几何体
为模型估算大厦主楼的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f986a0d8f37177dcccfee3898a66fd00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e663220a66eff19da6a71e46b397db2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c431cd12f858f0bc8dabb1d8c0b8e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/020ebe1219437129358b986eb9e70bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/300d29bf2277a510ab443c1e2a55e1bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4336253885d52e43ba6eaa297ea847b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3157362e4455a2176539f8bdcfcea93c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2faca11afa8ddaa19cde2e91ee5983f7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/31/d2649820-fc38-45b9-ba26-9032c8bf3c25.jpg?resizew=128)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/31/fdf3aa87-7bc9-4fc4-a1b2-d692595b7966.png?resizew=149)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/154c43b58f7f6389d6d71aa520b6c34f.png)
(2)试分别以正三棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71f2185273bf04c11118c7954f7ec822.png)
您最近一年使用:0次
2 . 如图,在四棱锥
中,底面
为菱形,
平面ABCD,
为
的中点.
与直线
相交于点
,求证:
为
的中点;
(2)若
,
,直线
与平面
所成角的大小为
,求PD的长.
![](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/5a1b49f64e0065edad868b25e9fcada3.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/c09afc70f448545336304333d5b5658b.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4f5eec0addba78f2e0cdfb7ecc59a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20b69099d2b74ffbb1f365e1468bd8fa.png)
您最近一年使用:0次
2024-01-11更新
|
668次组卷
|
5卷引用:上海市黄浦区2023-2024学年高二上学期期末调研测试数学试卷
上海市黄浦区2023-2024学年高二上学期期末调研测试数学试卷(已下线)第12讲 8.6.2直线与平面垂直的判定定理(第1课时)-【帮课堂】(人教A版2019必修第二册)(已下线)13.2.3 直线与平面的位置关系(2)-【帮课堂】(苏教版2019必修第二册)(已下线)第八章 立体几何初步(二)(知识归纳+题型突破)(2)-单元速记·巧练(人教A版2019必修第二册)(已下线)专题13.4空间直线与平面的位置关系--重难点突破及混淆易错规避(苏教版2019必修第二册)
名校
3 . 如图,在三棱柱
中,侧面
为正方形,
;设M是
的中点,满足
,N是BC的中点,P是线段
上的一点.
(1)证明:
平面
;
(2)若
,
,求直线
与平面PMN所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a566b100fb2ebe3d208f9b6527934218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2027fa3dfcde1373ca0222e1358e0c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/12/e6f1d103-14a1-4a6c-8261-f1a5cc952c65.png?resizew=182)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0edb1508fc95765f3bb316bcb5252d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/105347676853328617bf64545d8546cb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d768ffd5bf75080e8ff5ce6b472c0cc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4f68b8069f0df9e3dbe15c3d7cf5052.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
您最近一年使用:0次
2023-12-12更新
|
361次组卷
|
2卷引用:上海市虹口区2024届高三上学期期终学生学习能力诊断测试数学试题
解题方法
4 . 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.
您最近一年使用:0次
名校
解题方法
5 . 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)
您最近一年使用:0次
2023-08-16更新
|
361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)
6 . 如图所示,在三棱柱
中,
是正三角形,D为棱AC的中点,
,平面
交
于点E.
(1)证明:四边形
是矩形
(2)若
,
,求平面
与平面
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e735911ba4cd7f8fca6b3f65d705b573.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d1a1b7edecd3344707cf04ea3e86916.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/28/2068dbb5-902e-4557-a15b-09c7c15d4df0.png?resizew=182)
(1)证明:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/202794c51b2166eca170da9c53247bea.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46fe926770d2354e172dec02f5ce2efe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e3c9e7c05de9838c0c5d762720d3ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/202794c51b2166eca170da9c53247bea.png)
您最近一年使用:0次
解题方法
7 . 如图,已知正方体
中,
分别是
和
的中点.
(1)求证:
;
(2)求直线
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/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/27/0e53a7c1-ded4-4d57-9f45-e4d5e81da55d.png?resizew=160)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbab0d58ada3e27f98b95efd7cce7682.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e539f26ed5e0b20ff7220559324869a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
您最近一年使用:0次
解题方法
8 . 如图,在直三棱柱
中,D,M,N,P分别是
,
,
,
的中点.
(1)求证:
平面
;
(2)设
,
,求异面直线
与
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/15/3043b820-790e-44a7-b333-168bc178a5df.png?resizew=141)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b6053e396df2cd152e1329fce766d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c55b765cfbdf6897f224556f703192.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7055180d0e29276c140e66e3fcf85782.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cc416a5b8dc234628e7475387888d82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee16c91119c5601a7c93a6642c95e7f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
您最近一年使用:0次
名校
解题方法
9 . 如图,在几何体
中,已知四边形
是正方形,
,
分别为
的中点,
为
上靠近点
的四等分点.
//平面
;
(2)证明:平面
//平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e84e2badefa89e78516c4cf0387e9b73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a5f302c1c2f7e1b46cad05594ed672e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eab5fd38299b0ef6e760b3b3949e7efb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632917e61f4208959686d118c7f19231.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ce50ba5e349425274f05d46d120a74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e1ef332e81b9dbaf0075a345711b02c.png)
您最近一年使用:0次
2023-07-02更新
|
1604次组卷
|
7卷引用:陕西省西安市阎良区2022-2023学年高一下学期期末数学试题
陕西省西安市阎良区2022-2023学年高一下学期期末数学试题福建省永春第一中学2022-2023学年高一下学期期末考试数学试题辽宁省葫芦岛市联合体2022-2023学年高一下学期第二次考试数学试题(已下线)第七章 立体几何与空间向量 第三节?第二课时直线,平面平行的判定与性质(讲)(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)第八章:立体几何初步章末重点题型复习(2)-同步精品课堂(人教A版2019必修第二册)(已下线)专题04空间点、直线、平面的位置关系与空间直线、平面的平行-期末真题分类汇编(新高考专用)
名校
解题方法
10 . 如图,在正方体
中
,
分别是棱
的中点,设
是线段
上一动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/8/137c6978-dfd3-48cf-b91f-e4f88373c934.png?resizew=170)
(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/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e86e3991200297ad172455e5ea93f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/8/137c6978-dfd3-48cf-b91f-e4f88373c934.png?resizew=170)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae8768996ca9a0f2c5d9a19abbd54df.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05479ce59da01ea9c5bef3f20efadb41.png)
您最近一年使用:0次
2023-05-05更新
|
1384次组卷
|
3卷引用:内蒙古自治区巴彦淖尔市衡越实验中学2022-2023学年高一下学期期末数学试题