解题方法
1 . 在棱长为2的正方体
中,
点为
中点,
点在正方形
内运动(含边界),在点
运动过程中,
点到平面
的最小距离是______ .
![](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/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/936673a4a40bd0e8d8fe0b2ad6330c7c.png)
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2 . 一个几何体的三视图如图所示,则该几何体的体积
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/17/a1091097-4bcd-445d-823f-d704cb4bddb3.png?resizew=172)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad83973d1361b2928c7e783ffd073b75.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/17/a1091097-4bcd-445d-823f-d704cb4bddb3.png?resizew=172)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
3 . 如图,在多面体
中,四边形
与
均为直角梯形,
,
平面
,
,
,G在
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/17/166699e3-2e85-4739-b946-8ce811c71d39.png?resizew=165)
(1)求证:
平面
;
(2)若
与
所成的角为
,求多面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.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/902824f000a9c1cdf455e929a4988520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd654221ab95fe241d9e0202443f2609.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eed15d0ed75bf936f224f931da5d950.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8cd6ddff9a2a428200f66616fea83c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0afface6e34f75dc6fb982a423c08388.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/17/166699e3-2e85-4739-b946-8ce811c71d39.png?resizew=165)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55537f7dbac74c17fe0dc386dcdab3fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/422210c777ac0d625bbd81cc7601bf9b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
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解题方法
4 . 直三棱柱
中,
,D为
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/16/79754152-e9d7-4fe3-9c67-4fedf97c898d.png?resizew=124)
(1)求证:平面
⊥平面
;
(2)若
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf929a4acfed060c5f159754fe137393.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/16/79754152-e9d7-4fe3-9c67-4fedf97c898d.png?resizew=124)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a211ad5a06b505b8365a62c1946f3cb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f5fc4ad65b723b6a8da4c8dac154e6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e02c85ea0d3afb8ec1b761f01424739b.png)
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5 . 直三棱柱
中,
,D为
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/16/bb98dce7-1ba3-4235-8126-63e106553e15.png?resizew=130)
(1)求证:平面
平面ABD;
(2)若
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf929a4acfed060c5f159754fe137393.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/16/bb98dce7-1ba3-4235-8126-63e106553e15.png?resizew=130)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e3a59d7bf91a7540e35ce0011ad9b97.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/162e1adbd2e18e412bfd924b78068d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e98058f394b0d5b4d8498b2dcfa3983.png)
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2023-05-15更新
|
1441次组卷
|
3卷引用:江西省九江市2023届高三三模数学(文)试题
名校
6 . 如图,棱长为2的正方体
中,P,Q为四边形
内的点(包括边界),且点P到AB的距离等于到平面
的距离,点Q到
的距离等于到平面ABCD的距离,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679748eab882a6be0fefd2cc300349a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d44e8bc37ed03f44470762748a8f942a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/16/72bfdebe-0a16-4e51-ae0d-dd9265eb1916.png?resizew=160)
您最近一年使用:0次
2023-05-15更新
|
1222次组卷
|
3卷引用:江西省九江市2023届高三三模数学(文)试题
7 . 榫卯是一种中国传统建筑、家具的主要结构方式,它凝聚了中华文明的智慧.它利用材料本身特点自然连接,既符合力学原理,又重视实用和美观,达到了实用性和功能性的完美统一.下图是榫卯结构中的一种,当其合并在一起后,可形成一个正四棱柱.将合并后的榫卯对应拿开(如图1所示),已知榫的俯视图如图2所示,则卯的主视图为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/16/9f8b5b34-8368-4843-8046-2e6ee04421fb.png?resizew=287)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/16/9f8b5b34-8368-4843-8046-2e6ee04421fb.png?resizew=287)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
8 . 在三棱锥
中
,
,
,
,
,则该三棱锥外接球的表面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79539e1e18d17fe5a3d89ad830e269d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbb05b8b630052ff544249ebd72d95d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c19f0fcacac715a1200770516d1e4a67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc7f3a962c5919bc2bfd273669953f5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-05-14更新
|
437次组卷
|
2卷引用:江西省上饶市六校2023届高三第二次联考数学(文)试题
9 . 如图,三棱柱
的底面为等边三角形,侧面
为菱形,
,点D,E分别为BC,
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/21/5424ae71-bf24-4d7a-99da-25882758d3f4.png?resizew=181)
(1)求证:
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/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ba9574b2a856772570046d87a6242be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dd033fe356400ee4d785ff1d140f6ed.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/21/5424ae71-bf24-4d7a-99da-25882758d3f4.png?resizew=181)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a9b4bc99161370f20f72fe970ab2dd8.png)
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2023-05-13更新
|
415次组卷
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2卷引用:江西省抚州市金溪县2023届高三高考仿真模拟考试数学(理)试题
名校
解题方法
10 . 如图,三棱柱
的底面为等边三角形,侧面
为菱形
,点D,E分别为BC,
的中点,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dd033fe356400ee4d785ff1d140f6ed.png)
![](https://img.xkw.com/dksih/QBM/2023/5/10/3234578696708096/3236313242877952/STEM/5e2024b68cb344e59f27ee91bbe3431a.png?resizew=193)
(1)求证:AD⊥平面
;
(2)记三棱柱
的体积为
,三棱锥
的体积为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e0ba422ae5d4b4176809dccfc3911e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dd033fe356400ee4d785ff1d140f6ed.png)
![](https://img.xkw.com/dksih/QBM/2023/5/10/3234578696708096/3236313242877952/STEM/5e2024b68cb344e59f27ee91bbe3431a.png?resizew=193)
(1)求证:AD⊥平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
(2)记三棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4764374bd2fb78e59cd0b283637baeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbc4564d198f3058edb5da449711a0ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63055a5d6916f99d07fede49120753f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae00abada46919dffcfb342971dcdabd.png)
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