名校
解题方法
1 . 某中学的校友会为感谢学校的教育之恩,准备在学校修建一座四角攒尖的思源亭如图它的上半部分的轮廓可近似看作一个正四棱锥,已知此正四棱锥的侧面与底面所成的二面角为30°,侧棱长为
米,则以下说法不正确( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/cf9789f0-0745-465a-b73e-ed8bb8ff981b.png?resizew=188)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ce0249a3ff99c083fa4421877549db1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/cf9789f0-0745-465a-b73e-ed8bb8ff981b.png?resizew=188)
A.底面边长为6米 | B.体积为![]() |
C.侧面积为![]() | D.侧棱与底面所成角的正弦值为![]() |
您最近一年使用:0次
2022-01-29更新
|
410次组卷
|
3卷引用:北京市第五十五中学2023-2024学年高二上学期期末模拟数学试题
(已下线)北京市第五十五中学2023-2024学年高二上学期期末模拟数学试题湖南省郴州市2021-2022学年高二上学期期末教学质量监测数学试题湖南省长沙市宁乡市2021-2022学年高一下学期期末数学试题
2 . 如图,在正方体
中,点
是对角线
上一动点,在点
从顶点
移动到顶点
的过程中,下列结论中错误的有( ).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/27/dc255631-7e3a-4fd5-b381-b5abfe53f6e5.png?resizew=172)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/27/dc255631-7e3a-4fd5-b381-b5abfe53f6e5.png?resizew=172)
A.二面角![]() ![]() |
B.直线![]() ![]() |
C.存在一个位置,使得![]() ![]() |
D.存在一个位置,使得平面![]() ![]() |
您最近一年使用:0次
名校
解题方法
3 . 如图,在四棱锥
中,
底面
,底面
是边长为1的正方形,
,则侧面
与底面
所成的二面角的大小是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/6/1385a33e-edc4-409b-aa8b-2bddf1ea9d94.png?resizew=130)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8c762086e5ba072fc253a26a7ad8b9f.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/fcc532cfe64300cb3da9e04a307c957a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/6/1385a33e-edc4-409b-aa8b-2bddf1ea9d94.png?resizew=130)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-10-24更新
|
768次组卷
|
3卷引用:北京市朝阳区2019~2020学年度高一下学期期末质量检测数学试题
名校
4 . 已知三棱锥
中,
.
(1)求证:平面
平面
;
(2)求二面角
的余弦值;
(3)若点M在线段
上,满足
,点N在线段
上,且
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/181f49f169aa408109fbafdab077a891.png)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a438393ddfc7da1804baf4932442bb35.png)
(3)若点M在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7cf1b9fa4914fe152dccc7da221b0fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79498e1df1280868532f59ee8059a223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3dbfc9719c6646d58bda36dba623902.png)
您最近一年使用:0次
名校
5 . 如图,在三棱柱
中,
平面
为正三角形, 侧面
是边长为
的正方形,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/2803d4c7-4397-4140-a746-ececddd814d4.png?resizew=215)
(1)求证
平面
;
(2)求二面角
的余弦值;
(3)试判断直线
与平面
的位置关系,并加以证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be9ee7fff039524b6848147d14444b5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d25e8fc3dda4f8b45491514b6e22a962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcaa21c6cc1086f121dbf9e39e52ec78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/2803d4c7-4397-4140-a746-ececddd814d4.png?resizew=215)
(1)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a22daf90ae241f084d526f7a6025926.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41104641f3e2260d00aeadf8fb8a078a.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/379c7b2495bdfcac49c1979bb14bcf5e.png)
(3)试判断直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41104641f3e2260d00aeadf8fb8a078a.png)
您最近一年使用:0次
2020-01-13更新
|
604次组卷
|
2卷引用:北京市西城区2019-2020学年高三上学期期末数学试题
名校
6 . 在边长为2的菱形
中,
,将这个菱形沿对角线
折成
的二面角,这时线段
的长度为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71a46dc0bb5d8fa33583817e530a5d21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/260200d547998bcac50a4a491382e7f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
您最近一年使用:0次
2021-01-27更新
|
401次组卷
|
2卷引用:北京市人大附中2020-2021学年度高二年级上学期数学期末练习试题
解题方法
7 . 如图,棱锥
中,
平面
,
,
,
是
中点,下列结论正确的是_______ ①
;②
;③平面
平面
;④二面角
的平面角为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a94d59dee2d5a8f0425b64b2083825.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deae57d07054a06b33749895b1540b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/554d7c1fea9a9dead1e365ff26ca03db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dcfc3fbb9b740b3b65b26800f5bde04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2df612db49ec562e7af61547c1fef496.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8704811c9c5dba854310ae0de2ba6b05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49cfd630472bc73bd8c2209376dbe9d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef5768a8d6630375daf58e971fa200c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9afae7ea15753ee52f997ff8292ff36.png)
![](https://img.xkw.com/dksih/QBM/2021/12/29/2883194329440256/2889391635324928/STEM/57b1b25a69ab42d383a9954453ae3645.png?resizew=190)
您最近一年使用:0次
解题方法
8 . 正方体
中,点
为
中点,平面
与平面
所成二面角的余弦值为( )
![](https://img.xkw.com/dksih/PilotRun/2019/10/9/2308152996413440/2314881509244928/EXPLANATION/f783e344f34c4fee87248b4c2dce930f.png?resizew=163)
![](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/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f233b375753611ffa7a93c2c12ef5e28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/PilotRun/2019/10/9/2308152996413440/2314881509244928/EXPLANATION/f783e344f34c4fee87248b4c2dce930f.png?resizew=163)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019高三上·浙江·学业考试
名校
9 . 如图,已知三棱锥S–ABC中,SA=SB=CA=CB=
,AB=2,SC=
,则二面角S–AB–C的平面角的大小为
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/0d23a46b-5862-4ba4-a4d4-8adad5dff8b4.png?resizew=199)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/0d23a46b-5862-4ba4-a4d4-8adad5dff8b4.png?resizew=199)
A.30° | B.45° | C.60° | D.90° |
您最近一年使用:0次
2018-12-28更新
|
673次组卷
|
8卷引用:北京师大附中2019-2020学年上学期高二年级期末考试数学试题
北京师大附中2019-2020学年上学期高二年级期末考试数学试题(已下线)【新东方】双师309高一下新疆乌鲁木齐市第三十一中学2020-2021学年高一下学期期末考试数学试题(已下线)2019年1月浙江省普通高中学业水平考试数学仿真模拟试题03(已下线)江西省南昌市进贤二中2019-2020学年高二下学期数学期中考试数学试题(已下线)考点50 用综合法求角与距离-备战2022年高考数学一轮复习考点帮(新高考地区专用)【学科网名师堂】(已下线)第50讲 用综合法求角与距离(已下线)第八章立体几何初步章末题型大总结(精讲)(2)-【精讲精练】2022-2023学年高一数学下学期同步精讲精练(人教A版2019必修第二册)
解题方法
10 . 如图,已知一个八面体的各条棱长均为
,四边形
为正方形,给出下列命题:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/5/07da4b28-b2fc-48c0-8c80-aea1b875e9e6.png?resizew=191)
①不平行的两条棱所在的直线所成的角是
或
;
②四边形
是正方形;
③点
到平面
的距离为
;
④平面
与平面
所成的锐二面角的余弦值为
.
其中正确的命题有( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/5/07da4b28-b2fc-48c0-8c80-aea1b875e9e6.png?resizew=191)
①不平行的两条棱所在的直线所成的角是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
②四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/910936ec9fb419d51ce2f5ea817f8401.png)
③点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
④平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
其中正确的命题有( ).
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次