名校
1 . 如图,直三棱柱
中,
,
,
,
分别是棱
,
的中点.
![](https://img.xkw.com/dksih/QBM/2020/7/30/2517156470710272/2517839406735360/STEM/b9842a94542a4369bfa7aa91a99d3f79.png?resizew=178)
(1)证明:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ed8f7d3d7043d4b1eb98fc5c4e2fcd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/512cc5f78111d4592f6d843db6915f4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/2020/7/30/2517156470710272/2517839406735360/STEM/b9842a94542a4369bfa7aa91a99d3f79.png?resizew=178)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/565133e91e3ace2b2187cfc6f1db5be6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d365ce9f4bacc4d4bb15dbdb5306a5.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7235f9ae010fe4206def508d915d36c.png)
您最近一年使用:0次
2020-07-31更新
|
135次组卷
|
2卷引用:湖北省武汉市蔡甸区汉阳一中2020-2021学年高二上学期9月月考数学试题
名校
解题方法
2 . 如图,
是圆
的直径,点
是圆
上一点,
平面
,
、
分别是
、
边上的中点,点
是线段
上任意一点,若
.
![](https://img.xkw.com/dksih/QBM/2020/7/24/2512809572638720/2513343797215232/STEM/6b7a39b3bb844df9a58758ea527618cc.png?resizew=170)
(1)求异面直线
与
所成的角:
(2)若三棱锥
的体积等于
,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.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/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b64eacdd101e09e887130f88d519bff7.png)
![](https://img.xkw.com/dksih/QBM/2020/7/24/2512809572638720/2513343797215232/STEM/6b7a39b3bb844df9a58758ea527618cc.png?resizew=170)
(1)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)若三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/649b9a597fcc04c91c4f656ae5d69d68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/158b045c6172c4178d7aa52083e1489f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/464c24c1b5c93ac4bc6752fa1f8e4f9e.png)
您最近一年使用:0次
2020-07-25更新
|
569次组卷
|
4卷引用:湖北省华中师大附中2020届高三下学期高考预测联考文科数学试题
湖北省华中师大附中2020届高三下学期高考预测联考文科数学试题华大新高考联盟名校2020届高考预测考试5月数学文科试题江西省九江市第三中学2021-2022学年高二上学期第一次月考数学(理)试题(已下线)专题33 空间中线线角、线面角,二面角的求法-学会解题之高三数学万能解题模板【2022版】
3 . 设
,
是两条不同直线,
,
是两个不同平面,则下列命题中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
A.若![]() ![]() ![]() | B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() | D.若![]() ![]() ![]() |
您最近一年使用:0次
2020-07-25更新
|
702次组卷
|
8卷引用:湖北省武汉市江夏区实验高级中学2020-2021学年高二上学期12月月考数学试题
湖北省武汉市江夏区实验高级中学2020-2021学年高二上学期12月月考数学试题四川省内江市高中2020届第三次模拟考试理数试题四川省内江市2020届高三下学期第三次模拟考试数学(理)试题四川省内江市2020届高三下学期第三次模拟考试数学(文)试题(已下线)第31练 直线、平面垂直的判定与性质-2021年高考数学(文)一轮复习小题必刷浙江省湖州市长兴县、德清县,安吉县等三县2017-2018学年高二上学期期中数学试题(已下线)练习15+直线、平面平行的判定与性质-2020-2021学年【补习教材·寒假作业】高一数学(北师大版)甘肃省嘉谷关市第一中学2020-2021学年高三上学期二模考试数学(文)试题
名校
4 . 如图,
,
,
均为正三角形,
,
中点为
,将
沿
翻折,使得点
折到点
的位置.
![](https://img.xkw.com/dksih/QBM/2020/7/20/2510021193916416/2511218922577920/STEM/caa2a4a6444e44869eeafa17cf317b38.png?resizew=431)
(1)证明:
平面
;
(2)当
时,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2020/7/20/2510021193916416/2511218922577920/STEM/caa2a4a6444e44869eeafa17cf317b38.png?resizew=431)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30f457418e6a7e21f0ed0bf490a3709c.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3e27f6e6d1592408508cc9fd14d480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1069d514c3c32aeabd274475ee209ed6.png)
您最近一年使用:0次
2020-07-22更新
|
1134次组卷
|
4卷引用:湖北省武汉市华中师范大学第一附属中学2020届高三下学期高考押题考试理科数学试题
名校
解题方法
5 . 对于不同直线
,
和不同平面
,
,有如下四个命题,其中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
A.若![]() ![]() ![]() ![]() |
B.若![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() |
您最近一年使用:0次
2020-07-04更新
|
394次组卷
|
4卷引用:山东省泰安肥城市2020届高三适应性训练(二)数学试题
山东省泰安肥城市2020届高三适应性训练(二)数学试题(已下线)第六单元立体几何初步(A卷 基础过关检查)-2021年高考数学一轮复习单元滚动双测卷(新高考地区专用)(已下线)2021届高三数学新高考“8+4+4”小题狂练(30)湖北省武汉市育才高级中学2021-2022学年高二上学期第一次月考数学试题
6 . 在四棱锥
中,
,则四棱锥
的体积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7e0d751bff94eb30c0125ab553c09ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
A.![]() | B.![]() | C.![]() | D.3 |
您最近一年使用:0次
名校
7 . 如图,在三棱柱
中,侧面
是边长为4的菱形,且
,面
面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/425b9792-45ee-4115-8a16-27240fb0b943.png?resizew=207)
(1)求证:
面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93ecf0d955692e3ddacbda6035c70a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61cdaadeae37736a1e6dd93fa1fe712f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e6fbf78350d99b5310b3d824d6d0943.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/425b9792-45ee-4115-8a16-27240fb0b943.png?resizew=207)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91441b6a208013fa5e8ddf7c8cd1f43d.png)
您最近一年使用:0次
2020-06-03更新
|
379次组卷
|
2卷引用:2020届湖北省武汉市高三下学期5月质量检测理科数学试题
解题方法
8 . 如图,在三棱柱
中,侧面
是边长为4的菱形,且
,面
面
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/0c8e429d-07f4-4bf5-95e3-961f4cb43890.png?resizew=193)
(1)求证:
面
;
(2)求
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6798bf9d72d6d23920a7e30104af2f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61cdaadeae37736a1e6dd93fa1fe712f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94185437d95fb9e4928d88e7798ed160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/0c8e429d-07f4-4bf5-95e3-961f4cb43890.png?resizew=193)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
您最近一年使用:0次
名校
9 . 如图,在四棱锥
中,
平面
,
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/4b6176de-f6cf-4b53-84a3-d7a53edd7e04.png?resizew=160)
(1)求证:
;
(2)求平面
与平面
所成锐二面角的余弦值.
![](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/41cd5c4f8b106d01e0e431078e1a468b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f776c501a180174257d5dff5ed599907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68d31600cba2d5256c7e78b6122d6755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3bbe4cdd2c154bd9a8073b0d4cecb8a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/4b6176de-f6cf-4b53-84a3-d7a53edd7e04.png?resizew=160)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdfa54114f04a75b8c96165b3718ed7f.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ef67284b03310b208a185cc6a86d5cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeb5255e2159617505e0c87d01437a57.png)
您最近一年使用:0次
2020-05-25更新
|
261次组卷
|
2卷引用:2020届湖北省武汉市部分学校高三下学期5月在线学习摸底检测理科数学试题
解题方法
10 . 如图,在三棱柱ABC﹣A1B1C1中,A1A⊥平面ABC,∠ACB=90°,AC=CB=C1C=1,M,N分别是AB,A1C的中点.
![](https://img.xkw.com/dksih/QBM/2020/5/4/2455342760468480/2456713784918016/STEM/043672b815f94714a22f614c64bdbdc2.png?resizew=178)
(1)求证:直线MN⊥平面ACB1;
(2)求点C1到平面B1MC的距离.
![](https://img.xkw.com/dksih/QBM/2020/5/4/2455342760468480/2456713784918016/STEM/043672b815f94714a22f614c64bdbdc2.png?resizew=178)
(1)求证:直线MN⊥平面ACB1;
(2)求点C1到平面B1MC的距离.
您最近一年使用:0次