解题方法
1 . 在棱长为1的正四面体
中,P为棱
(不包含端点)上一动点,过点P作平面
,使
,
与此正四面体的其他棱分别交于E,F两点,设
,则
的面积S随x变化的图象大致为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/398a7cdc39e756d8f7f7ee1185579b37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0924d39475d22d6ce04fbca2bfff2d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b51d3992644d37dc71c9b5a97d515c.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
2 . 已知矩形
的长为2,宽为1.(如图所示)
平面
,分别求
到AB和AD的距离.
(2)在矩形ABCD中,点M是AD的中点、点N是AB的三等分点(靠近A点).沿折痕MN将
翻折成
,使平面
平面
.又点G,H分别在线段NB,CD上,若沿折痕GH将四边形
向上翻折,使C与
重合,求线段NG的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce72fc01251a86f7335f7d0ef5d8e925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
(2)在矩形ABCD中,点M是AD的中点、点N是AB的三等分点(靠近A点).沿折痕MN将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8e7040c2fd8a163d71e35805775feb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99f37a5a875bdfc4f87b63773c435575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a4a65943afdb9e9d1d945185630d46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
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2023-10-22更新
|
349次组卷
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3卷引用:广东省深圳市深圳外国语学校2024届高三上学期第二次模拟测试数学试题变式题17-22
(已下线)广东省深圳市深圳外国语学校2024届高三上学期第二次模拟测试数学试题变式题17-22上海市进才中学2023-2024学年高二上学期10月月考数学试题广东省深圳市深圳外国语学校2024届高三上学期第二次模拟测试数学试题
名校
3 . 如图,平面
平面
,
,且
为正三角形,点D是平面
内的动点,ABCD是菱形,点O为AB中点,AC与OD交于点Q,
,且
,则PQ与l所成角的正切值的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9934483d3f6ceb7fd9f6ea8a2747940.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1754786a3367aca3da18ee3316e5b968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5f56d4a08e50b95c1033c1ea3380c64.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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4 . 已知等腰直角
的斜边
分别为
上的动点,将
沿
折起,使点
到达点
的位置,且平面
平面
.若点
均在球
的球面上,则球
表面积的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/459b19dad2585cc38729ad07b2548a58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5881068127a39caf319492b4177204f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99f37a5a875bdfc4f87b63773c435575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dae7f709cd4bf123f329605b2f9ea679.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c0413c46cc967b60eb9b021165a81e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2023-04-15更新
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1710次组卷
|
5卷引用:押新高考第6题 立体几何
(已下线)押新高考第6题 立体几何(已下线)专题03 基本立体图形、直观图、表面积与体积-期末真题分类汇编(新高考专用)浙江省绍兴市2023届高三下学期4月高考适应性考试(二模)数学试题江苏省苏州市八校2022-2023学年高一下学期综合质量监测(期末联考)数学试题浙江省绍兴市上虞区2023-2024学年高二上学期期末质量调测数学试题
解题方法
5 . 蜜蜂是自然界的建筑大师,在18世纪初,法国数学家马拉尔迪指出,蜂巢是由许许多多类似正六棱柱形状的蜂房(如图)构成,其中每个蜂房的底部都是由三个全等的菱形构成,每个菱形钝角的余弦值是
,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/28/1c4260b6-2cfd-49d4-89b4-52bcceef513a.png?resizew=154)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f30d314a642667fef559032264647366.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/28/1c4260b6-2cfd-49d4-89b4-52bcceef513a.png?resizew=154)
A.![]() ![]() ![]() |
B.![]() |
C.蜂房底部的三个菱形所在的平面两两垂直 |
D.该几何体的体积与以六边形![]() ![]() |
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6 . 如图,圆台
的轴截面为等腰梯形
,
,B为底面圆周上异于A,C的点.
内,过
作一条直线与平面
平行,并说明理由;
(2)设平面
∩平面
,
与平面QAC所成角为
,当四棱锥
的体积最大时,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e65ac334119ccd6204402a7aba29a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e53b212640dadf751ef7f65a78a209.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b8c6d80251fdeabfebd65bca460d55b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f664c0db517bec6886ff0b6100fd474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc9ffc43a56921fe79f8602636b8b0f.png)
(2)设平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc9ffc43a56921fe79f8602636b8b0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0bd886276f8ff9df2a42013b337d726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29a0c82028e1259f300facd32775a15e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52c6c1f6d821af7e3c8058993218a861.png)
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2023-02-25更新
|
2326次组卷
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8卷引用:第11讲 第一章 空间向量与立体几何 章末题型大总结(2)
名校
7 . 已知边长为
的菱形
中,
,将
沿
翻折,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a311738db3fc5431d14a0942542a62e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
A.在翻折的过程中,直线![]() ![]() ![]() |
B.在翻折的过程中,三棱锥![]() ![]() |
C.在翻折过程中,三棱锥![]() ![]() |
D.在翻折的过程中,点![]() ![]() ![]() ![]() ![]() ![]() ![]() |
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2021-08-07更新
|
1126次组卷
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4卷引用:第8章立体几何初步(基础、典型、易错、压轴)分类专项训练
(已下线)第8章立体几何初步(基础、典型、易错、压轴)分类专项训练江苏省宿迁市2020-2021学年高一下学期期末数学试题(已下线)第8章 立体几何初步(典型30题专练)-2021-2022学年高一数学考试满分全攻略(人教A版2019必修第二册)辽宁省沈阳市第十一中学2023-2024学年高二上学期10月月考数学试题
名校
8 . 如图,
是边长为
的等边三角形,点
在
所在平面外,平面
平面
,点
是棱
的中点,点
分别在棱
上,且
,
. 现给出下列四个结论:①
平面
;②
是定值;③三棱锥
体积的最大值是
;④若三棱锥
的体积是
,则该三棱锥外接球的表面积是
.其中正确结论的个数是( )
![](https://img.xkw.com/dksih/QBM/2021/7/30/2775558110601216/2778914752757760/STEM/98f15ea6-9997-4185-ad37-3150592fd438.png?resizew=285)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89d4b113b22890bc910fa4502812f8e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5bb827adb2c31957a566704ed957c97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d14733aa8ee1b11bc861cd581156ea4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209e3b87346e057276f0692a7361e446.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ca820a456491348e72587e4fe10bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db8a91062cd1f6e139960b219e9eeb26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2daa8c54f9228940bdcbb91638f3e4cc.png)
![](https://img.xkw.com/dksih/QBM/2021/7/30/2775558110601216/2778914752757760/STEM/98f15ea6-9997-4185-ad37-3150592fd438.png?resizew=285)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
9 . 如图,在等边三角形
中,
分别是线段
上异于端点的动点,且
,现将三角形
沿直线
折起,使平面
平面
,当
从
滑动到
的过程中,则下列选项中错误的是( )
![](https://img.xkw.com/dksih/QBM/2021/5/17/2723257399418880/2724539355774976/STEM/a04e91ee-2f89-4caf-9182-7b4e775090e6.png?resizew=347)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421291381be28da4bd16560fd383b4a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c42bce098904b241986bb91c65ab33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://img.xkw.com/dksih/QBM/2021/5/17/2723257399418880/2724539355774976/STEM/a04e91ee-2f89-4caf-9182-7b4e775090e6.png?resizew=347)
A.![]() | B.二面角![]() |
C.![]() ![]() | D.![]() ![]() |
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2021-05-19更新
|
1364次组卷
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7卷引用:专题9.立体几何与空间向量 -《2022届复习必备-2021届浙江省高考冲刺数学试卷分项解析》
(已下线)专题9.立体几何与空间向量 -《2022届复习必备-2021届浙江省高考冲刺数学试卷分项解析》(已下线)专题10 立体几何-备战2022年高考数学(文)母题题源解密(全国乙卷)(已下线)热点08 立体几何-2022年高考数学【热点·重点·难点】专练(新高考专用)(已下线)专题8-4 立体几何中求角度、距离类型-2022年高考数学毕业班二轮热点题型归纳与变式演练(全国通用)(已下线)第二章 立体几何中的计算 专题一 空间角 微点10 二面角大小的计算综合训练【培优版】浙江省金华市义乌市2021届高三下学期适应性考试数学试题苏教版(2019) 必修第二册 过关斩将 章节测试 第13章 立体几何初步