1 . 如图,圆形纸片的圆心为
,半径为
,该纸片上的正方形
的中心为
,
、
、
、
为圆
上点,
,
,
,
分别是以
,
,
,
为底边的等腰三角形,沿虚线剪开后,分别以
,
,
,
为折痕折起
,
,
,
,使得
、
、
、
重合,得到四棱锥.当该四棱锥体积取得最大值时,正方形
的边长为______
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/244ea6a312d4b6831a6b833ea3f4fcd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797e67927616b141ed7c6b83f8b6f4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fee50575e3ebd56c4f46dd0bbf8e55d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbda7249e6387d4a0ad11595883a584f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f12cc84355f5585d1e3d12dde4e0c795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbc6c92562ed4769af22da8b6d1006d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a96239564d22c91aaa0f9f78cf487a25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbda7249e6387d4a0ad11595883a584f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f12cc84355f5585d1e3d12dde4e0c795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbc6c92562ed4769af22da8b6d1006d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a96239564d22c91aaa0f9f78cf487a25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797e67927616b141ed7c6b83f8b6f4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fee50575e3ebd56c4f46dd0bbf8e55d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97153bc3d02dfb38ee046487a8037a41.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/3ca4eaa7-9a51-4a38-b844-44e0b30674d6.png?resizew=170)
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2 . 某三棱锥的三视图如图所示,则该三棱锥的体积为
![](https://img.xkw.com/dksih/QBM/2019/12/27/2364124288344064/2365124242538496/STEM/7b243e35104e49568211f3f1dfab3a7a.png?resizew=111)
![](https://img.xkw.com/dksih/QBM/2019/12/27/2364124288344064/2365124242538496/STEM/403438ed72da48c39e08ded14af7e943.png?resizew=75)
正(主)视图 侧(左)视图
![](https://img.xkw.com/dksih/QBM/2019/12/27/2364124288344064/2365124242538496/STEM/76db3d1a5e66421fa6d49e5e3b00affa.png?resizew=103)
俯视图
![](https://img.xkw.com/dksih/QBM/2019/12/27/2364124288344064/2365124242538496/STEM/7b243e35104e49568211f3f1dfab3a7a.png?resizew=111)
![](https://img.xkw.com/dksih/QBM/2019/12/27/2364124288344064/2365124242538496/STEM/403438ed72da48c39e08ded14af7e943.png?resizew=75)
正(主)视图 侧(左)视图
![](https://img.xkw.com/dksih/QBM/2019/12/27/2364124288344064/2365124242538496/STEM/76db3d1a5e66421fa6d49e5e3b00affa.png?resizew=103)
俯视图
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 如图,
、
分别是三棱锥
的棱
、
的中点,
,
,
,则异面直线
与
所成的角为
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/36bbbc3d-7745-4a65-b0ba-725a13cd9c7a.png?resizew=155)
![](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/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9c893198d60f9129971aabf596d0ec2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec82d5207daadaefea6846b4036347a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/36bbbc3d-7745-4a65-b0ba-725a13cd9c7a.png?resizew=155)
A.![]() | B.![]() | C.![]() | D.![]() |
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19-20高一·浙江杭州·期末
名校
4 . 如图为一个几何体的三视图,则该几何体中任意两个顶点间的距离的最大值为
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/9014d5aa-28a9-46b4-87db-cd241d92a3ff.png?resizew=221)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/9014d5aa-28a9-46b4-87db-cd241d92a3ff.png?resizew=221)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-10-12更新
|
172次组卷
|
5卷引用:湖北省黄石市2019-2020学年高三上学期9月调研理科数学试题
名校
解题方法
5 . 如图,在四棱锥
中,
平面
,底面是棱长为
的菱形,
,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/5784c08c-8831-4e86-9694-ebeba116736d.png?resizew=195)
(1)求证:
//平面
;
(2)求直线
与平面
所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c161375e4e6f61f1cbef8083c02e975.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/364d6c88726d8c3bb8ed297057332bac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/5784c08c-8831-4e86-9694-ebeba116736d.png?resizew=195)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68a7bf0da4f7c6f739d2e2461ad9b7.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2019-08-02更新
|
1074次组卷
|
4卷引用:湖北省孝感市孝南区孝感高级中学2019-2020学年高二上学期9月月考数学试题
6 . 如图,四棱锥
中,底面 ABCD为矩形,侧面为正三角形,且平面
平面
E 为 PD 中点,AD=2.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/2723d66a-2dfa-45a1-bf48-e2122f297d55.png?resizew=193)
(1)证明平面AEC丄平面PCD;
(2)若二面角
的平面角
满足
,求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efe11ff2c080a2346c3a0f156ebaabd2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/2723d66a-2dfa-45a1-bf48-e2122f297d55.png?resizew=193)
(1)证明平面AEC丄平面PCD;
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75eb1402f4270b68723f61f9e6375d33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4009bdd7f95dbfc97141b7c8b836dfa0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
您最近一年使用:0次
2019-08-02更新
|
887次组卷
|
8卷引用:湖北省沙市中学、郧阳中学、恩施高中、随州二中2019-2020学年高二上学期第三次月考数学试题
湖北省沙市中学、郧阳中学、恩施高中、随州二中2019-2020学年高二上学期第三次月考数学试题湖南师范大学附属中学2018届高三上学期月考试卷(三)(11月)数学理试题辽宁省实验中学东戴河分校2019-2020学年高二上学期12月月考数学试卷辽宁省实验中学、大连八中、大连二十四中、鞍山一中、东北育才学校2017-2018学年高二上学期期末考试数学(理)试题河北省武邑中学2018届高三上学期第五次调研考试数学(理)试题福建省闽侯第六中学2017-2018学年高二上学期期末考试数学(理)试题湖南省五市十校2018-2019学年高二下学期期末联考数学(理)试题1湖南省五市十校2018-2019学年高二下学期期末联考数学(理)试题2
名校
解题方法
7 . 已知三棱锥
的四个顶点都在球
的球面上,且球
的表面积为
,
,
平面
,
,则三棱锥
的体积为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61fdb4a700641d17886052d20d7d84ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87dc2ccc39c16ba9cb647e62f08387f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
您最近一年使用:0次
2019-07-29更新
|
287次组卷
|
5卷引用:湖北省黄冈市黄州中学(黄冈市外国语学校)2023-2024学年高二上学期第一次阶段性测试数学试题
名校
8 . 在棱长为1的正方体ABCD-A1B1C1D1中,点A关于平面BDC1对称点为M,则M到平面A1B1C1D1的距离为( )
A.![]() | B.![]() | C.![]() | D.![]() |
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2019-06-06更新
|
991次组卷
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3卷引用:【市级联考】湖北省武汉市2019届高三2月调研测试数学(文科)试题
【市级联考】湖北省武汉市2019届高三2月调研测试数学(文科)试题湖北省黄冈中学2020届高三下学期适应性考试理科数学试题(已下线)专题41:空间距离向量求法-2023届高考数学一轮复习精讲精练(新高考专用)
名校
9 . 在如图所示的三棱锥A-BCD中,BD=2,DC=3,∠DAB+∠BAC+∠DAC=90°,∠ADB=∠BDC=∠ADC=90°.现有一只蚂蚁从点D出发经三棱锥A-BCD的三个侧面绕行一周后回到点D,则蚂蚁爬行的最短距离为_______ .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/a93f4839-e464-4a12-958c-6d812cb9b825.png?resizew=145)
您最近一年使用:0次
2019-06-06更新
|
529次组卷
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4卷引用:【全国百强校】湖北省荆州市沙市中学2018-2019学年高一5月月考数学试题
【全国百强校】湖北省荆州市沙市中学2018-2019学年高一5月月考数学试题人教B版(2019) 必修第四册 逆袭之路 第十一章 11.1.4 棱锥与棱台四川省宜宾市叙州区第二中学校2023-2024学年高三上学期开学考试理科数学试题(已下线)11.2 锥体(第1课时)(七大题型)(分层练习)-2023-2024学年高二数学同步精品课堂(沪教版2020必修第三册)
10 . 我国齐梁时代的数学家祖暅提出了一条原理:“幂势既同,则积不容异”.意思是:两个等高的几何体若在所有等高处的水平截面的面积相等,则这两个几何体的体积相等.椭球体是椭圆绕其轴旋转所成的旋转体.如图,将底面直径都为
,高皆为
的椭半球体和已被挖去了圆锥体的圆柱放置于同一平面
上,用平行于平面
且与平面
任意距离
处的平面截这两个几何体,可横截得到
及
两截面.可以证明
总成立.据此,半短轴长为1,半长轴长为3的椭球体的体积是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8231c13e8a6f86250faf3df6b14fdce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cf4ca38dd88abe1906764a913f89a11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9907b710022afe51c7ff377fc472f683.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3521e5848342f1bcad027fb616208dd3.png)
![](https://img.xkw.com/dksih/QBM/2019/4/4/2175264621789184/2176598841499648/STEM/8406dcf0-9436-4980-8fd5-7270068fb7dd.png?resizew=419)
您最近一年使用:0次
2019-04-06更新
|
786次组卷
|
4卷引用:【市级联考】湖北省十堰市2018-2019学年高二下学期第一次月考文科数学试题
【市级联考】湖北省十堰市2018-2019学年高二下学期第一次月考文科数学试题【市级联考】福建省龙岩市2019届高三第一学期期末教学质量检查数学(理科)试题【全国百强校】安徽省六安市第一中学2019届高三高考模拟(四)数学(文)试题(已下线)押第13题 推理与证明-备战2021年高考数学(文)临考题号押题(全国卷2)