解题方法
1 . 如图,在多面体
中,平面
平面
,
平面
,
和
均为正三角形,
,
.
(1)求多面体
的体积.
(2)在线段
上是否存在点
,使得
平面
?说明理由;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17580410bf63dba4fe164265afaac4cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662698361c6b3ddaf0c28a3c87be53e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75929268210da5976bc37d080da030dd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/7/9ffb5c30-d01b-49fa-a02b-ecebba9e6db3.png?resizew=141)
(1)求多面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8ccd4181f956f6e0140bf0ab8f0716.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
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2 . 如图,在
中,
,且
,
,将
绕直角边
旋转
到
处,得到圆锥的一部分,点
是底面圆弧
(不含端点)上的一个动点.
,使得
?若存在,求出
的大小;若不存在,请说明理由;
(2)当四棱锥
体积最大时,求
沿圆锥侧面到达点
的最短距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c38c41700c823af569af37a652caac96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbb05b8b630052ff544249ebd72d95d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/967f74b8993c61634ceed95edca05ffd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0211da37e92f915e781691296578ba0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90197a948331e61db644266368017e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5157b42da58d55daad27d98b2fec15ff.png)
(2)当四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cc1bc8449eeafb19ddde59d8f3c77db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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3 . 如果一个正多面体的所有面都是全等的正三角形或正多边形,每个顶点聚集的棱的条数都相等,这个多面体叫做正多面体.有趣的是只有正四面体、正方体、正八面体、正十二面体和正二十面体五种正多面体,现将它们的体积依次记为,
.
(1)利用金属板分别制作正多面体模型各一个,假设制作每个模型的外壳用料(即表面积)均等于
,分别求出
和
的值;并猜想
与
的大小关系(猜想不需证明)
(2)多面体的欧拉定理:简单多面体的面数
、棱数
与顶点数
满足:
.已知正多面体都是简单多面体,设某个正多面体每个顶点聚集的棱的条数为
,每个面的边数为
,求
满足的关系式;并尝试据此说明正多面体仅有五种.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5142a5f4db2068493b7d414806f24e5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/11/b1197459-0825-43ff-858f-f8721faa0bc7.png?resizew=548)
(1)利用金属板分别制作正多面体模型各一个,假设制作每个模型的外壳用料(即表面积)均等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bf956f7cef485a7a509fd8229d7eb48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/789ce79353afd7894c4a912815e370f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0af6f28b405604706431065a6620423.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fee8e86607a073a323a51640d0e40532.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1104314b67a6607d116064c8dd1a0108.png)
(2)多面体的欧拉定理:简单多面体的面数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a098e3851f80b3d3c273d34416c4778e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2442dc47b9650e00a0cef190e4cc5e5f.png)
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4 . 如图,已知点
在圆柱
的底面圆
上,
为圆
的直径,圆柱
的表面积为
,
.
(1)求异面直线
与
所成角的大小;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192f4f9446c954a291f779d963f90257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192f4f9446c954a291f779d963f90257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f5f9251b20115e4f9bfc2005ef26f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7ab16f75ad17c1a3fd1a8333a780341.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/10/820d36ba-06c5-4b51-aa0f-f54d77d3375f.png?resizew=140)
(1)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a571745474520e3db9cb68c76585f63.png)
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5 . 在
平面上,将两个函数
和
、两条直线
和
围成的封闭图形记为
,如图所示,记
绕
轴旋转一周而成的几何体为
,则
的体积值________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b91d90e35deba1cdc76b3247d8d909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034e4d08e558565864c14672bf75a4ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/107babba45f110012183dc4dc54490f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a7df955fc17e92fd86302f8c34664a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/11/81df9384-c6f4-4fd4-bc9c-cf0544733343.png?resizew=205)
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6 . 定义空间点到几何图形的距离为:这一点到这个几何图形上各点距离中最短距离.在空间中,记边长为1的正方形
区域(包括边界及内部的点)为
,则到
距离等于1的点所围成的几何体的体积为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
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2022-06-29更新
|
332次组卷
|
4卷引用:上海市嘉定区第二中学2021-2022学年高一下学期期末自查数学试题
上海市嘉定区第二中学2021-2022学年高一下学期期末自查数学试题第11章 简单几何体(B卷·能力提升练)-【单元测试】2022-2023学年高二数学分层训练AB卷(沪教版2020必修第三册)(已下线)11.4球(作业)(夯实基础+能力提升)-【教材配套课件+作业】2022-2023学年高二数学精品教学课件(沪教版2020必修第三册)(已下线)高考新题型-立体几何初步
名校
7 . 如图,水平放置的正四棱台玻璃容器的高为
,两底面对角线
的长分别为
,水深为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/bb523adf-68cf-403e-aa3f-32f3586165d2.png?resizew=222)
(1)求正四棱台的体积;
(2)将一根
长的玻璃棒
放在容器中,
的一端置于点
处,另一端置于侧棱
上,求
没入水中部分的长度.(容器厚度,玻璃棒粗细均忽略不计)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5df73433f151b6016f23788ebd995ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5b744ad79a32193388220878d856bcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17ec9f6673dc3ef7ab61851783bf5d9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/689ff84e2d7f52c7446ef789a54557da.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/bb523adf-68cf-403e-aa3f-32f3586165d2.png?resizew=222)
(1)求正四棱台的体积;
(2)将一根
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e57171806f407a98dd8a796d4d2d6bbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bf1bf3c5e344b6192208069f33811e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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2021-12-20更新
|
673次组卷
|
5卷引用:第09讲 空间几何体的结构与直观图(核心考点讲与练)(1)
(已下线)第09讲 空间几何体的结构与直观图(核心考点讲与练)(1)上海市曹杨第二中学2021-2022学年高二上学期12月月考数学试题(已下线)第14讲 简单几何体的表面积与体积-【寒假自学课】2022年高一数学寒假精品课(人教A版2019必修第二册)(已下线)8.3 简单几何体的表面积与体积云南昭通市第一中学2021-2022学年高一下学期奖学金考试数学试题
8 . 直三棱柱
的侧棱长为2,侧棱
到平面
的距离不小于1,从此三棱柱中去掉以此侧棱
为直径的球所占的部分,余下的几何体的表面积与原三棱柱的表面积相等,则所剩几何体的体积最小值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f96c673a2381f118ea2d3efc0bca1f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
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2021-12-11更新
|
500次组卷
|
7卷引用:上海市文来高中2022-2023学年高一上学期期中数学试题
上海市文来高中2022-2023学年高一上学期期中数学试题上海市徐汇区南洋模范中学2021-2022学年高二上学期期中数学试题(已下线)第02讲 简单几何体(核心考点讲与练)(1)(已下线)上海高二上学期期中【易错、好题、压轴60题考点专练】(1)上海市南洋模范中学2022-2023学年高二上学期期中数学试题(已下线)11.4球(作业)(夯实基础+能力提升)-【教材配套课件+作业】2022-2023学年高二数学精品教学课件(沪教版2020必修第三册)(已下线)期中真题必刷易错40题(17个考点专练)-【满分全攻略】2023-2024学年高二数学同步讲义全优学案(沪教版2020必修第三册)
9 . 如图,在正四棱柱
中,
,
,M为棱
的中点
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/27/a9888988-b90e-4111-945b-4dadfff6b41b.png?resizew=125)
(1)求三棱锥
的体积;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d8cb98c0adee7ca698d8b17dacb845b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/27/a9888988-b90e-4111-945b-4dadfff6b41b.png?resizew=125)
(1)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/283f3b88373640e012bbcd78931d1065.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5563473602e1b17d582a165b7b7b6b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
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名校
10 . 中国古代数学名著《九章算术》中记载:“刍(chú)甍(méng)者,下有袤有广,而上有袤无广.刍,草也.甍,屋盖也.”翻译为“底面有长有宽为矩形,顶部只有长没有宽为一条楼.刍字面意思为茅草屋顶.”现有一个刍如图所示,四边形
为正方形,四边形
,
为两个全等的等腰梯形,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/238e84b4-88c0-4282-a641-a67cc1a965d4.png?resizew=181)
(1)求二面角
的大小;
(2)求三棱锥
的体积;
(3)点
在直线
上,满足
(
),在直线
上是否存在点
,使
平面
?若存在,求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41d3f7d55fcbaebc4e2450ac63a3dc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed6034301fc4110da89bdb0f46ad82ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/510b162030e04fab26e05fe268675c07.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/238e84b4-88c0-4282-a641-a67cc1a965d4.png?resizew=181)
(1)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a34e44c5d7e1d22521fb293994f5b0.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b635e62c3b1f4a57feac8d22be84ee.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/885f6c143bd3b2f9860d94b969b3c5da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe9e329f2730b2be926b121f1ae04c0f.png)
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8卷引用:上海市文来高中2022-2023学年高一上学期期中数学试题
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