解题方法
1 . 如图,四棱柱
的底面为菱形,
为
中点,
为
中点,
为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/cf02d440-b8fe-4498-9f48-1d5927f7215e.png?resizew=141)
(1)证明:直线
平面
;
(2)若
平面
,
,
,
,求平面
与平面
所成的锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/cf02d440-b8fe-4498-9f48-1d5927f7215e.png?resizew=141)
(1)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc674d2604ff270dd6abc66b35e86e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e8a20c1fc8a5620db5db3a74eb01201.png)
(2)若
![](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/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e8a20c1fc8a5620db5db3a74eb01201.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66715c82a022f2c829e09d057bdb78e9.png)
您最近一年使用:0次
解题方法
2 . 如图,在长方体
中,E,F分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/2022/1/18/2897166202675200/2921334978387968/STEM/ae098f6be916476b92d9a3158f2d97c3.png?resizew=271)
(1)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
平面
;
(2)若
,求平面AEF与平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://img.xkw.com/dksih/QBM/2022/1/18/2897166202675200/2921334978387968/STEM/ae098f6be916476b92d9a3158f2d97c3.png?resizew=271)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b724168afaee2ecddf97257180be18.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/876a5f5b6c620b8f6af8c011d1868791.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/544133e145fa7cc6782e675a0892bd4f.png)
您最近一年使用:0次
解题方法
3 . 在四棱锥
中,底面ABCD为平行四边形,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/31/22b4e11d-0419-4c9d-9c27-d94691d84fc5.png?resizew=167)
(1)证明:四边形ABCD为菱形;
(2)E为棱PB上一点(不与P,B重合),证明:AE不可能与平面PCD平行.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb96e0331eebe80ed1ff610faf531fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccbd1316b9d1f0c1e71fd078deec61f6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/31/22b4e11d-0419-4c9d-9c27-d94691d84fc5.png?resizew=167)
(1)证明:四边形ABCD为菱形;
(2)E为棱PB上一点(不与P,B重合),证明:AE不可能与平面PCD平行.
您最近一年使用:0次
真题
名校
4 . 在如图所示的圆台中,AC是下底面圆O的直径,EF是上底面圆O
的直径,FB是圆台的一条母线.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/3/f0218997-2f80-43b2-8240-e0f8c27d5e25.png?resizew=200)
(Ⅰ)已知G,H分别为EC,FB的中点,求证:GH∥平面ABC;
(Ⅱ)已知EF=FB=
AC=
,AB=BC.求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9041a3dc5017c192cad54b40aa3f35f9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/3/f0218997-2f80-43b2-8240-e0f8c27d5e25.png?resizew=200)
(Ⅰ)已知G,H分别为EC,FB的中点,求证:GH∥平面ABC;
(Ⅱ)已知EF=FB=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47342449ca1a78a7550975a7589003c5.png)
您最近一年使用:0次
2016-12-04更新
|
2130次组卷
|
11卷引用:湖北省黄冈中学2021届高三下学期5月适应性考试数学试题
湖北省黄冈中学2021届高三下学期5月适应性考试数学试题2016年全国普通高等学校招生统一考试理科数学(山东卷精编版)2016-2017学年河北定州市高二上学期期中数学试卷人教A版高中数学必修二 2.3.2 平面与平面垂直的判定(已下线)专题17 立体几何综合-五年(2016-2020)高考数学(理)真题分项河北正定中学2021届高三上学期第四次半月考数学试题沪教版(2020) 一轮复习 堂堂清 第八单元 8.10 空间向量在立体几何中的应用(二)(已下线)2016年全国普通高等学校招生统一考试理科数学(山东卷参考版)(已下线)专题24 空间向量与空间角的计算-十年(2011-2020)高考真题数学分项(已下线)专题23 立体几何解答题(理科)-1专题31立体几何与空间向量解答题(第二部分)
2023·全国·模拟预测
5 . 如图,在四棱柱
中,底面
是边长为2的菱形,
,
,平面
平面
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/28/b2642951-7f28-4bdb-9512-a73ea25d26b2.png?resizew=256)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
平面
;
(2)若四棱柱
的体积为6,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/c1cb1df353c6907fec5823964eef36c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a58a622e2b1a239f2f96aa1501e9799.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/191eca2270134573c8e7633c88b1316c.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/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/28/b2642951-7f28-4bdb-9512-a73ea25d26b2.png?resizew=256)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923189afc198d153c79059a827f63c87.png)
(2)若四棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a965fd810cc5a5404677020c267e747.png)
您最近一年使用:0次
名校
解题方法
6 . 如图,在直四棱柱
中,底面四边形
为梯形,点
为
上一点,且
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/6/5/2736394871193600/2737819917500416/STEM/81210a37863449af8959795daea8687a.png?resizew=144)
(1)求证:
平面
;
(2)求点
到平面
的距离.
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b86cde4e24036082b9c92253a6f579e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5d3aaafa4e988aee932be29cf5ac0e.png)
![](https://img.xkw.com/dksih/QBM/2021/6/5/2736394871193600/2737819917500416/STEM/81210a37863449af8959795daea8687a.png?resizew=144)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21c8f2410d6a17adcf6817b08d20f3ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ded2e3fdcab984f3699972fc3ff75d5.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4294ffdba16ae69fd03b13959d682aba.png)
您最近一年使用:0次
2021-06-07更新
|
822次组卷
|
6卷引用:安徽省蚌埠市第二中学2021届高三下学期高考最后一模文科数学试题
安徽省蚌埠市第二中学2021届高三下学期高考最后一模文科数学试题四川省遂宁市2021届高三三模数学(文)试题(已下线)考点32 直线、平面平行的判定及其性质-备战2022年高考数学(文)一轮复习考点帮山西大学附属中学2022届高三上学期11月期中数学(文)试题山西省吕梁学院附属高级中学2022届高三上学期期中数学(文)试题河南省名校联盟2021-2022学年上学期高三第一次诊断考试文科数学试题
名校
解题方法
7 . 如图,三棱柱
的侧棱
垂直于底面ABC,
是正三角形,
,点D在线段
上,且
,点E在线段
上且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/adbf0c7d-09b3-4ea6-be0d-c7c1e4fdbffb.png?resizew=227)
(1)求证:直线
平面
;
(2)若三棱锥
的体积为
,求线段AB的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad1a56baf43ffdf67bc8460856e31fec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b12f28117a52dc0ee6941639196a700.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c166191c6041395b51a9e5f609450f07.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/adbf0c7d-09b3-4ea6-be0d-c7c1e4fdbffb.png?resizew=227)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063510e3c1fb6a7ccc3b8e3e3c7d660e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)若三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85ffe968b09340adfdb8372728b25a22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69a8b76e36783a69d14ec54af82c7df0.png)
您最近一年使用:0次
8 . 如图,在长方体
中,
,
,
.点
为对角线
的中点.
![](https://img.xkw.com/dksih/QBM/2021/5/14/2720988618948608/2723219581706240/STEM/e314658d-175b-4ced-afeb-f4524319905f.png?resizew=245)
(1)证明:直线
平行于平面
;
(2)求点
到平面
的距离.
![](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/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b856f2a5bdf65dab56eba6f25a75fc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/152236216f8d1cb39b261108e8fc8b9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://img.xkw.com/dksih/QBM/2021/5/14/2720988618948608/2723219581706240/STEM/e314658d-175b-4ced-afeb-f4524319905f.png?resizew=245)
(1)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/981773fc223d7fd6c03ab4aa12455541.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/152236216f8d1cb39b261108e8fc8b9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/981773fc223d7fd6c03ab4aa12455541.png)
您最近一年使用:0次
名校
解题方法
9 . 如图,
是边长为2的等边三角形,平面
平面ABC,且
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/9e8bb84d-b9bf-4ea1-a6db-d25c7cfc4786.png?resizew=222)
(1)求证:
平面ABC;
(2)求平面ABC与平面BEF所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c99e6d75d606b5cae9392ecca969200.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ee73d6253a130741216c1a28727de30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa18c2a78c400c80a5760743f31771c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/089bf1fe65e136185c5ec7cb29c43e1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70abed7faf55deb24162255c5ad59577.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/9e8bb84d-b9bf-4ea1-a6db-d25c7cfc4786.png?resizew=222)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
(2)求平面ABC与平面BEF所成锐二面角的余弦值.
您最近一年使用:0次
2021-05-23更新
|
731次组卷
|
2卷引用:安徽省皖江联盟2021届高三下学期最后一卷理科数学试题
解题方法
10 . 如图,在四棱锥P—ABCD中,PD⊥底面ABCD,底面ABCD是边长为1的菱形.
G为PD的中点,E为AG的中点,点F在线段PB上,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebd38be3024e7e7649d603a2831c2e3.png)
![](https://img.xkw.com/dksih/QBM/2021/12/17/2874427922063360/2927407668994048/STEM/4c961fe4-6b5a-4db8-8f5b-33526acff2f3.png?resizew=218)
(1)求证:EF∥平面ABCD;
(2)求GF与平面ABCD所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8f559c75a138ce2e1c710305a644cce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebd38be3024e7e7649d603a2831c2e3.png)
![](https://img.xkw.com/dksih/QBM/2021/12/17/2874427922063360/2927407668994048/STEM/4c961fe4-6b5a-4db8-8f5b-33526acff2f3.png?resizew=218)
(1)求证:EF∥平面ABCD;
(2)求GF与平面ABCD所成角的正弦值.
您最近一年使用:0次