1 . 已知正方体
的棱长为
分别是棱
的中点,下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18755b4aaf64e1d055018c8510f8f2e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5307e04a84a0621e4d5bd2aaa1980ef.png)
A.![]() |
B.![]() |
C.棱![]() ![]() |
D.四面体![]() |
您最近一年使用:0次
解题方法
2 . 已知
,
,
,
四点在球心为
,半径为5的球面上,且满足
,
,设
,
的中点分别为
,
,则( )
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8cc58ef27567f0ab06eb1012aec330.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
A.点![]() ![]() |
B.线段![]() |
C.四面体![]() |
D.四面体![]() |
您最近一年使用:0次
解题方法
3 . 已知球
和正四面体
,点
在球面上,底面
过球心
,棱
分别交球面于
,若球的半径
,则所得多面体
的体积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5afb48823a518430d2143185b7d274.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4697e1b0bc8288d139a7a431f17598b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd55399a949325d805a349edfbf07450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d841ca587786a72a70ea04349ff77fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75dd0706025a22610f277f5b741dd591.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
4 . 已知直四棱柱
的底面是菱形,
,棱长均为4,
,
的中点分别为
、
,则三棱锥
的体积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e918b70b02a73685e3c536c7f380e2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e30c9a609e3a860eb16ff025f4427f5.png)
您最近一年使用:0次
2023-02-15更新
|
588次组卷
|
2卷引用:安徽省淮北市2023届高三下学期一模数学试题
名校
解题方法
5 . 如图,已知在长方体
中,
,
,
,点E为
上的一个动点,平面
与棱
交于点F,给出下列命题:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/186040db-9a02-4c63-af08-5c5419f0bcfc.png?resizew=147)
①四棱锥
的体积为20;
②存在唯一的点E,使截面四边形
的周长取得最小值
;
③当点E不与C,
重合时,在棱AD上均存在点G,使得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
平面
;
④存在唯一的点E,使得
平面
,且
.
其中正确的是___________ (填写所有正确的序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f3e58edd1f900ca82bb2a3058293f52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a83c0b8db2205a6815811aa4ff5390f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/186040db-9a02-4c63-af08-5c5419f0bcfc.png?resizew=147)
①四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b492d99c54c1d881aa0532d918c19389.png)
②存在唯一的点E,使截面四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6069dc466eec75bbeb3d5c9b51cb3a70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f734ed6ddf5b05e496519b15a4edc30.png)
③当点E不与C,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a83c0b8db2205a6815811aa4ff5390f.png)
④存在唯一的点E,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/565133e91e3ace2b2187cfc6f1db5be6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a83c0b8db2205a6815811aa4ff5390f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be76345fa868237ae80c1a79809ee54f.png)
其中正确的是
您最近一年使用:0次
2021-12-21更新
|
833次组卷
|
8卷引用:安徽省淮北市第一中学2020届高三下学期第七次月考数学(理)试题
安徽省淮北市第一中学2020届高三下学期第七次月考数学(理)试题新疆维吾尔自治区乌鲁木齐市2019-2020学年高三第一次诊断性测试数学理试题2020届湖南省长沙市长郡中学高三下学期3月“停课不停学”阶段性检测数学(文)试题(已下线)第二章 立体几何中的计算 专题七 空间范围与最值问题 微点4 面积、体积的范围与最值问题(二)【基础版】广东省佛山市顺德区罗定邦中学2020-2021学年高二上学期期中数学试题江西省吉安市第一中学2022-2023学年高二上学期期末考试数学试题新疆伊犁新源县2021-2022学年高二上学期期末考试数学(理)试题(已下线)1.4.1 用空间向量研究直线、平面的位置关系(AB分层训练)-【冲刺满分】2023-2024学年高二数学重难点突破+分层训练同步精讲练(人教A版2019选择性必修第一册)
解题方法
6 . 如图,在四棱台
中,
底面
,M是
中点,四边形
为正方形,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af2616713e2801e00bdcf4c9883f973b.png)
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712436809400320/2716542322786304/STEM/af257467-2d63-45fc-828a-5680baac009d.png?resizew=295)
(Ⅰ)求证:直线
平面
;
(Ⅱ)求D点到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0760712e3e2ea02b755b751e760d0c55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af2616713e2801e00bdcf4c9883f973b.png)
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712436809400320/2716542322786304/STEM/af257467-2d63-45fc-828a-5680baac009d.png?resizew=295)
(Ⅰ)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2164a9dd77a54b1999a0f5ab0ecf09df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c4a1f5a0cdcabfcb417d26f69b337de.png)
(Ⅱ)求D点到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c4a1f5a0cdcabfcb417d26f69b337de.png)
您最近一年使用:0次
2021-05-08更新
|
203次组卷
|
2卷引用:安徽省淮北市2021届高三下学期第二次模拟考试文科数学试题
名校
解题方法
7 . 如图,在四棱锥
中,底面
为平行四边形,且
底面
,
.
![](https://img.xkw.com/dksih/QBM/2020/8/15/2528240295264256/2531127757897728/STEM/aef2409e-2e04-4e53-959a-f74cea85ad7e.png)
(1)证明:
平面
.
(2)若Q为
的中点,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87d4b7bdc5aba66f4d24ef800e9fbbda.png)
![](https://img.xkw.com/dksih/QBM/2020/8/15/2528240295264256/2531127757897728/STEM/aef2409e-2e04-4e53-959a-f74cea85ad7e.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)若Q为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44b30d2860ee8cda28a3486d0bbba428.png)
您最近一年使用:0次
2020-08-19更新
|
736次组卷
|
5卷引用:安徽省淮北市第一中学2020届高三下学期第八次月考数学(文)试题
安徽省淮北市第一中学2020届高三下学期第八次月考数学(文)试题甘肃省天水一中2020-2021学年高三上学期第一次考试数学(文科)试题(已下线)专题20 立体几何综合-2020年高考数学(文)母题题源解密(全国Ⅱ专版)甘肃省天水一中2019-2020学年高二下学期期末(文科)数学试题甘肃省天水市第一中学2019-2020学年高二下学期期末考试数学(文)试题
8 . 如图所示的几何体
中,
,
,
,
平面
,
平面
,点M在线段
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/10/a227716b-31e6-4073-a48e-0e883f57c8af.png?resizew=251)
(1)证明:
平面
;
(2)若点F为线段
的中点,且三棱锥
的体积为2,求
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99da52604d90b4772725a2632a39dbb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/689c065652544780be8b33ae92cbb6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed04b01505bbd8a4ac0bc12e46f23bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89add161a52c0d2b92b751dd156c6850.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/10/a227716b-31e6-4073-a48e-0e883f57c8af.png?resizew=251)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0edb1508fc95765f3bb316bcb5252d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)若点F为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b6e3f0518632294dc748ca9710d15b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
名校
解题方法
9 . 如图,在空间几何体
中,四边形
为直角梯形,四边形
为矩形,
.
![](https://img.xkw.com/dksih/QBM/2020/5/12/2461212092743680/2461672812396544/STEM/923497eb93f842f4b84a13d488444fd5.png?resizew=265)
(1)证明:
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e89556992cbfd7043330ac7421d342.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a06137ecbeaf69f8a48a51047bd0b5d.png)
![](https://img.xkw.com/dksih/QBM/2020/5/12/2461212092743680/2461672812396544/STEM/923497eb93f842f4b84a13d488444fd5.png?resizew=265)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3d4549e612c07eafe4036422e54fc26.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8964550c7fc31d982b1534e884ad6f52.png)
您最近一年使用:0次
2020-05-13更新
|
147次组卷
|
2卷引用:安徽省淮北市第一中学2020届高三下学期第七次月考数学(文)试题
名校
解题方法
10 . 已知正三棱柱
所有棱长均为2,
分别为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/a9f26173-a2c6-4b5a-8660-702d3ae05c08.png?resizew=134)
(1)求证:
平面
;
(2)求三棱锥
体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9debd13454918684cf8e07ce210516fc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/a9f26173-a2c6-4b5a-8660-702d3ae05c08.png?resizew=134)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aa6d64d90b17044cb17ff3061420c08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1369f53ea899e522cd567138d7e667bf.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ef92c57971bf63ec6d77f8f654774dd.png)
您最近一年使用:0次
2020-05-04更新
|
308次组卷
|
3卷引用:安徽省淮北市第一中学2019-2020学年高三下学期第五次考试数学(文)试题