解题方法
1 . 阅读数学材料:“设
为多面体
的一个顶点,定义多面体
在点
处的离散曲率为
,其中
为多面体
的所有与点
相邻的顶点,且平面
,平面
,…,平面
和平面
为多面体
的所有以
为公共点的面.”解答问题:已知在直四棱柱
中,底面
为菱形,
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/275fc582ec511e4c5a2a98f69da0cdff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20559c2fce92126341420a8170dacc2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/183f3fdb3204864ff2f60c8c1dac2f2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db59863ffec5fa450ab8342fd8675c2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9d7f18c3c9dae7e6d4f2e96281289f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f733e19f18ab01a3c022331805ed58a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](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/eeed487430a5b8a330f2d0c52166521a.png)
A.直四棱柱![]() |
B.若![]() ![]() ![]() ![]() |
C.若四面体![]() ![]() ![]() ![]() ![]() |
D.若直四棱柱![]() ![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
2023-04-13更新
|
2547次组卷
|
6卷引用:辽宁省大连市2023届高三一模数学试题
辽宁省大连市2023届高三一模数学试题东北三省四市教研联合体2023届高三一模数学试题吉林省长春市2023届高三三模数学试题(已下线)模块六 专题4 易错题目重组卷(辽宁卷)(已下线)模块六 专题13 易错题目重组卷(吉林卷)云南省曲靖市第二中学2023届高三二模预测数学试题
名校
解题方法
2 . 如图,四棱锥
的底面是边长为2的正方形,
为
的中点,
面
,且
,动点
在以
为球心半径为1的球面上运动,点
在面
内运动,且
,则
长度的最小值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/16b6ea31-0d96-411f-aed3-6c3e0f715d3e.png?resizew=258)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b61346bd4091070ba84a4046f87f365.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4d14c6959273338a048b023805cce80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b4f4fb22f03557c71cf668cfe9ab9fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ef70a6b2f9fefb69743149df0e2357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c3be72f3f0fc7f5c03660519f18a304.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/16b6ea31-0d96-411f-aed3-6c3e0f715d3e.png?resizew=258)
A.![]() | B.![]() | C.![]() | D.![]() |
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2020-04-06更新
|
1327次组卷
|
8卷引用:辽宁省部分中学2021-2022学年高三上学期期末检测数学试题
辽宁省部分中学2021-2022学年高三上学期期末检测数学试题湖南师范大学附属中学2022-2023学年高三上学期月考(六)数学试题(已下线)第三章 空间轨迹问题 专题六 立体几何轨迹中的范围、最值问题 微点1 立体几何轨迹中的范围、最值问题【培优版】浙江省嘉兴市七校2019-2020学年高二上学期期中联考数学试题四川省内江市资中县第二中学2020-2021学年高二上学期11月月考数学文科试题四川省内江市资中县第二中学2020-2021学年高二上11月月考理科试题(已下线)专练30 期中综合检测卷(B卷)-2021-2022学年高二数学上册同步课后专练(人版A版选择性必修第一册)湖南省长沙市雅礼中学2022-2023学年高一下学期5月第三次月考数学试题
3 . 正方体
的棱长为
,在
,
,
,
,
,
这六个顶点中.选择两个点与
,
构成正三棱锥
,在剩下的四个顶点中选择两个点与
,
构成正三棱锥
,
表示
与
的公共部分,则
的体积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2020-06-29更新
|
540次组卷
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5卷引用:辽宁省葫芦岛市2020届高三5月联合考试数学理科试题
解题方法
4 . 如图圆锥PO,轴截面PAB是边长为2的等边三角形,过底面圆心O作平行于母线PA的平面,与圆锥侧面的交线是以E为顶点的抛物线的一部分,则该抛物线的焦点到其顶点E的距离为
![](https://img.xkw.com/dksih/QBM/2020/2/4/2392011465678848/2393069658095616/STEM/8b746da285604628a4e0f33122c942b8.png?resizew=255)
![](https://img.xkw.com/dksih/QBM/2020/2/4/2392011465678848/2393069658095616/STEM/8b746da285604628a4e0f33122c942b8.png?resizew=255)
A.1 | B.![]() | C.![]() | D.![]() |
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5 . 一个正方体内接于一个球(即正方体8个顶点都在球面上),过球心作一截面,则截面的图形不可能是( )
A.![]() | B.![]() | C.![]() | D.![]() |
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6 . 四面体ABCD中,已知
,
,则异面直线AC与BD所成角的正弦值是_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26e15b22b4be1f8d41d22a5e175a42ad.png)
您最近一年使用:0次
解题方法
7 . 已知正三棱柱ABC﹣A1B1C1的所有棱长之和为36,则当此正三棱柱的侧面积取得最大值时,其外接球的体积为_____ .
您最近一年使用:0次
2012高三·辽宁·竞赛
8 . 在四面体
中,已知
.若过
与平面
相切并且与该四面体的外接球面相内切的球面的半径为1,则四面体
外接球面的半径为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1040821354ea2986b88c88a685e7fb7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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9 . 在长方体
中,
.则异面直线
与
间的距离为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e820f3f1c3f16180c75cd5ae10eefb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
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A.1 | B.![]() | C.![]() | D.![]() |
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