名校
解题方法
1 . 过空间一定点P的直线中,与长方体的12条棱所在直线成等角的直线共有 _____ 条.
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2 . 某粮仓是如图所示的多面体,多面体的棱称为粮仓的“梁”.现测得底面ABCD是矩形,AB=16米,AD=4米,DE=AE=BF=CF,腰梁AE、BF、CF、DE分别与相交的底梁所成角均为60°.
(1)请指出所有互为异面且相互垂直的“梁”,并说明理由;
(2)若不计粮仓表面的厚度,该粮仓可储存多少立方米的粮食?
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/19/9cafe16d-01d0-4207-a081-f2d2cfe71114.png?resizew=160)
(1)请指出所有互为异面且相互垂直的“梁”,并说明理由;
(2)若不计粮仓表面的厚度,该粮仓可储存多少立方米的粮食?
您最近一年使用:0次
2022-04-28更新
|
193次组卷
|
3卷引用:上海市晋元高级中学2021-2022学年高二上学期10月月考数学试题
名校
3 . 如图,在正方体
中,点M,N分别为棱
上的动点(包含端点),则下列说法正确的是_____________ .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/65aec8f5-f26a-4d32-ac7f-88ca59db064c.png?resizew=165)
①当M为棱
的中点时,则在棱
上存在点N使得
;
②当M,N分别为棱
的中点时,则在正方体中存在棱与平面
平行;
③当M,N分别为棱
的中点时,则过
,M,N三点作正方体的截面,所得截面为五边形;
④若正方体的棱长为2,则三棱锥
的体积可能为1;
⑤直线
与平面
所成角的正切值的最小值为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/281ed7ea4b53f930ebf1bd142893e3b1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/65aec8f5-f26a-4d32-ac7f-88ca59db064c.png?resizew=165)
①当M为棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66fae8e33cd86fa8dab72704eaafe1ba.png)
②当M,N分别为棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/281ed7ea4b53f930ebf1bd142893e3b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e74395b07e8153a0ef0bbcb5881013f.png)
③当M,N分别为棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/281ed7ea4b53f930ebf1bd142893e3b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
④若正方体的棱长为2,则三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95116284af5cbe14446e6a57bf464a45.png)
⑤直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
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2021-12-13更新
|
909次组卷
|
2卷引用:山西省晋城市第一中学2021-2022学年高二上学期第五次调研数学试题
4 . 如图,在
中,
为直角,点
分别在边
上,且
,将
沿直线EF翻折成
,使
平面
,设直线
与
所成的角为
,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/0a9196b9-4dd1-456e-999d-21fdd762af2b.png?resizew=316)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b96dce1ec94eb90c243b2eddb78476.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500b03b654d25bec0eb5baac32c71480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b472adec657acb93e8bab976a7e8dd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cde52e02168c74b4b1c0a8ce09287df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7829855159327b2a87c3a424b3f7134a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd52e0a6db2c4d6749fb5947994b1f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e663220a66eff19da6a71e46b397db2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/0a9196b9-4dd1-456e-999d-21fdd762af2b.png?resizew=316)
A.![]() | B.![]() |
C.![]() | D.上述情况都有可能 |
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解题方法
5 . 如图动点
在正四棱锥
表面上运动, 正四棱锥各棱长均为1,
与DA所成角等于CE与
所成角, 记为
, 以下结论正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/11/19/2854684251701248/2857008539500544/STEM/2f9a277bbd6245aaabcc0e5c31b95a30.png?resizew=167)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61588617d22abd00af4ca489bb3a8787.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://img.xkw.com/dksih/QBM/2021/11/19/2854684251701248/2857008539500544/STEM/2f9a277bbd6245aaabcc0e5c31b95a30.png?resizew=167)
A.动点E形成的轨迹是正三角形 |
B.动点![]() |
C.![]() ![]() |
D.动点![]() ![]() |
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6 . 如图,ABCD与ADEF是两个边长为1的正方形,它们所在的平面互相垂直.
![](https://img.xkw.com/dksih/QBM/2021/11/21/2856054245351424/2856972157730816/STEM/75c868fe-c28c-46ff-a23d-ccb61c6c2430.png?resizew=219)
(1)求异面直线AE与BD所成角的大小;
(2)在线段BD上取点M,在线段AE上取点N,且
,
,试用x,y来表示线段MN的长度;
(3)在(2)的条件下,求MN长度的最小值,并判断当MN最短时,MN是否是异面直线AE与BD的公垂线段?
![](https://img.xkw.com/dksih/QBM/2021/11/21/2856054245351424/2856972157730816/STEM/75c868fe-c28c-46ff-a23d-ccb61c6c2430.png?resizew=219)
(1)求异面直线AE与BD所成角的大小;
(2)在线段BD上取点M,在线段AE上取点N,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da39d66009576e7d0d664d1faee3e389.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea8fb90cd939a5495d572c9628df968.png)
(3)在(2)的条件下,求MN长度的最小值,并判断当MN最短时,MN是否是异面直线AE与BD的公垂线段?
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名校
解题方法
7 . 从正方体八个顶点的两两连线中任取两条直线a,b,且a,b是异面直线,则a,b所成角的余弦值的所有可能取值构成的集合是( )
A.![]() | B.![]() |
C.![]() | D.![]() |
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2021-11-22更新
|
1338次组卷
|
9卷引用:上海市格致中学2021-2022学年高二上学期期中数学试题
上海市格致中学2021-2022学年高二上学期期中数学试题(已下线)第10章 空间直线与平面(A卷·知识通关练)-【单元测试】2022-2023学年高二数学分层训练AB卷(沪教版2020必修第三册)(已下线)第01讲 空间直线与平面(核心考点讲与练)(1)上海市松江二中2023-2024学年高二上学期10月月考数学试题(已下线)期中真题必刷压轴50题专练-【满分全攻略】2023-2024学年高二数学同步讲义全优学案(沪教版2020必修第三册)(已下线)专题8-4 立体几何中求角度、距离类型-2022年高考数学毕业班二轮热点题型归纳与变式演练(全国通用)(已下线)专题15 立体几何(练习)-2(已下线)重难点专题02 空间点直线平面之间的位置关系-【同步题型讲义】(已下线)第二章 立体几何中的计算 专题一 空间角 微点3 异面直线所成角综合训练【培优版】
8 . “六边形教室”是四中校友记忆中不可磨灭的一部分.空间中,教室的形状近似一个正六棱柱.设正六棱柱
中,所有棱长均相等,M、N分别是四边形
,
的中心,设MN与
所成的角为
,
与
所成的角为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/858be9a2f30a22cfdebeaa5bf2e45b4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30bbe0ca8db43552ce01d592c80523e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f21346b407532a0e94e70d14de67ef82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c597ff77c65c5add6f50294e3eee9536.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a9fcaa804011c37873b03ee284504fe.png)
A.120° | B.90° | C.75° | D.60° |
您最近一年使用:0次
名校
解题方法
9 . 已知
,
为两条异面直线,在直线
上取点
,
,在直线
上取点
,
,使
,且
(称
为异面直线
,
的公垂线).已知
,
,
,
,则异面直线
,
所成的角为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a65625c665efc912192a0d5d0fa6c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d7ed7f746c3314bbb402f0a90cbdace.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51f686d7497de2e660b17dedea238907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae341f580ff8fbf21f616fe900b0e4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e7c422a19b68b8b4cd484d22897e3a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebdd421619a060fc8049b77f114554ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-10-14更新
|
494次组卷
|
6卷引用:山西省运城市教育发展联盟2021-2022学年高二上学期10月月考数学试题
山西省运城市教育发展联盟2021-2022学年高二上学期10月月考数学试题山东省青岛市4区市2021-2022学年高二上学期期中考试数学试题山西省平遥中学校2021-2022学年高二上学期期中数学试题湖北省潜江市园林高级中学2022-2023学年高二上学期10月月考数学试题山东省泰安市2022-2023学年高二上学期期中考试数学试题(已下线)第二章 立体几何中的计算 专题二 空间距离 微点8 空间两条直线的距离(四)【培优版】
名校
10 . 如图(1)是一副直角三角板.现将两个三角板沿它们的公共边翻折成图(2)的四面体
,设
,
与面
所成角分别为
,
,在翻折的过程中,下列叙述正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/10/9/2825575199817728/2828531898515456/STEM/5730fc01a7a04cdd91a591de1cd31992.png?resizew=541)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://img.xkw.com/dksih/QBM/2021/10/9/2825575199817728/2828531898515456/STEM/5730fc01a7a04cdd91a591de1cd31992.png?resizew=541)
A.存在某个位置使得![]() |
B.若![]() ![]() ![]() |
C.当![]() ![]() ![]() ![]() |
D.异面直线![]() ![]() ![]() |
您最近一年使用:0次
2021-10-13更新
|
851次组卷
|
5卷引用:浙江省精诚联盟2021-2022学年高二上学期10月联考数学试题