名校
解题方法
1 . 如图,若正方体的棱长为2,点
是正方体
的底面
上的一个动点(含边界),
是棱
的中点,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/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/28/b8fdaf1a-be9f-4764-8968-755fa3265c06.png?resizew=173)
A.若保持![]() ![]() ![]() ![]() |
B.三棱锥![]() ![]() |
C.若![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() |
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2 . 如图正方体
的棱长是3,E是
上的动点,P、F是上、下两底面上的动点,Q是EF中点,
,则
的最小值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeedb5f361a1baff6338436fff6c471d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51590ba53a365210d9a3005966b7868d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/2ae58fbf-92cd-4af2-8691-afe3ee515efa.png?resizew=169)
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6卷引用:6.1基本立体图形 测试卷-2021-2022学年高一下学期数学北师大版(2019)必修第二册
名校
3 . 如图,在五面体
中,底面
为矩形,
和
均为等边三角形,
平面
,
,
,且二面角
和
的大小均为
.设五面体
的各个顶点均位于球
的表面上,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/21/9922bed7-bbff-4246-a837-64a6972fd2e9.png?resizew=215)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30a04a2b317c5a6b8b7eb5d760fbd818.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14e2bf04b646d77e272034198d21a1e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c5219d5b2c63eded763670e5800dd67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9abe6e8d1f4f1e8bdc46ddbae0cd789.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05ba310682e25a0c6d488e6aff816614.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5292af357a9c81f104ff2237053a4d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72c2044ecc165365634e21f3e95ec7f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a8b7a29b332ac3a192a2c19efa1f886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dadd8e8730b81d153ffa6c55a3ac68e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30a04a2b317c5a6b8b7eb5d760fbd818.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/701f3b0e2bedfe5195443459072d798e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/21/9922bed7-bbff-4246-a837-64a6972fd2e9.png?resizew=215)
A.有且仅有一个![]() ![]() |
B.有且仅有两个![]() ![]() ![]() |
C.当![]() ![]() |
D.当![]() ![]() |
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6卷引用:湖北省云学新高考联盟学校2022-2023学年高二上学期10月联考数学试题
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解题方法
4 . 已知
是边长为4的正三角形,
分别为
边上的一点(不含端点),现将
折起,记二面角
的平面角为
,若
,则四棱锥
体积的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e58e08ee0b2580a62cf20f709b5e90df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d0469336f71edd52dc9148c67db052.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff89a768c80c8200e6050dd052ae9fd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3416881a6f67d05fe6b67787047fc86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/048259b64cf454135f2f628cd0f9b3d9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
5 . 如图,矩形
中,
,边
,
的中点分别为
,
,直线BE交AC于点G,直线DF交AC于点H.现分别将
,
沿
,
折起,点
在平面BFDE同侧,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0842cdb22fc7b49057aef355eb7a1c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5df7626240940eb340420a605e95aeee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/098a3e7d1f1890863b7483a98b618119.png)
A.当平面![]() ![]() |
B.当平面![]() ![]() |
C.当![]() ![]() ![]() ![]() |
D.当![]() ![]() ![]() ![]() ![]() |
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6 . 如图,直三棱柱
中,
,
,
.点Р在线段
上(不含端点),则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/93a91b9a-97a1-49d9-8b55-44925a06366c.png?resizew=211)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0af405392c66b86550a58f1cb9868717.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19fc9f894312e55c87a0d6737080e233.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/93a91b9a-97a1-49d9-8b55-44925a06366c.png?resizew=211)
A.不存在点![]() ![]() |
B.![]() ![]() |
C.![]() ![]() |
D.三棱锥![]() ![]() |
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解题方法
7 . 正多面体也称柏拉图立体(被誉为最有规律的立体结构)是所有面都只由一种正多边形构成的多面体(各面都是全等的正多边形).数学家已经证明世界上只存在五种柏拉图立体,即正四面体、正六面体、正八面体、正十二面体、正二十面体.已知一个正八面体
的棱长都是2(如图),
、
分别为
、
的中点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78aa2d427fb896e5e192c2032a62b81b.png)
______ .若
,过点
的直线分别交直线
于
两点,设
(其中
均为正数),则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.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/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78aa2d427fb896e5e192c2032a62b81b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e43856d85d8b02b04c384e861b17b43e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/920d660d739cccff6b64c90125bafa64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28fb003b390ebb911cba4a49f96043da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0877194ab8760f54c35527177b03ff93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88ea271b3352d75008832f129d39dc0.png)
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8 . 所有的顶点都在两个平行平面内的多面体叫做拟柱体,这两个平行的面称为上下底面,它们之间的距离称为拟柱体的高.生产实际中,我们经常看到黄沙、碎石、灰肥等堆积成上下底面平行,且都是矩形的形状,这种近似于棱台的形体就是一种特殊的拟柱体(如图所示),已知其高为h,上底面、下底面和中截面(经过高的中点且平行于底面的截面)面积分别为
,
和
,请你用
,
,
,h表示出这种拟柱体的体积V=______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54f562eb3c2a45d65cba066d712825a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54f562eb3c2a45d65cba066d712825a5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/950f629d-5970-4152-ba3b-bf940d4e1136.png?resizew=168)
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9 . 如图,已知正方体
的棱长为
为正方形底面
内的一动点,则下列结论正确的有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/dd15d908-f3d6-4224-b870-6c2ac39373a4.png?resizew=158)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5420c8c4cf105205deb4a1b8327e6de8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/dd15d908-f3d6-4224-b870-6c2ac39373a4.png?resizew=158)
A.三棱锥![]() |
B.存在点![]() ![]() |
C.若![]() ![]() ![]() ![]() |
D.若点![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
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名校
解题方法
10 . 如下图,正方体
中,
为线段
上的动点,
平面
,则下面说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/3b033243-cc6c-4602-bb76-d57b1903d405.png?resizew=149)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0edb1508fc95765f3bb316bcb5252d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/3b033243-cc6c-4602-bb76-d57b1903d405.png?resizew=149)
A.直线![]() ![]() ![]() |
B.已知![]() ![]() ![]() ![]() |
C.点![]() ![]() ![]() ![]() ![]() |
D.点![]() ![]() ![]() |
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|
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