如图,在直四棱柱
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b05db872c7a37e0d06ca9f0278f9562.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6f8caf1d83ac27191a7a4ce3d81c769.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5fb45af7400c71ac728f9dfa09a5cb.png)
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48d30832deeebfc30b1799624e75b75f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/223036d27be5914db50fbd5cb19d4212.png)
:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/727ef02f-bf3c-4f85-8b52-52dc0d6654f1.png?resizew=182)
(1)求证:
平面
;
(2)现将与四棱柱
形状和大小完全相同的两个四棱柱拼成一个新的四棱柱,规定:若拼成的新四棱柱形状和大小完全相同,则视为同一种拼接方案,问共有几种不同的拼接方案?在这些拼接成的新四棱柱中,记其中最小的表面积为
,写出
的解析式;(直接写出答案,不必说明理由)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b05db872c7a37e0d06ca9f0278f9562.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6f8caf1d83ac27191a7a4ce3d81c769.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5fb45af7400c71ac728f9dfa09a5cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5cab760038d20eac10fe6108fbb334.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48d30832deeebfc30b1799624e75b75f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/223036d27be5914db50fbd5cb19d4212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b377f632949bff36083a5464113387fe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/727ef02f-bf3c-4f85-8b52-52dc0d6654f1.png?resizew=182)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
(2)现将与四棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0e6cb8d4e39fa44f71df04b74f123f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0e6cb8d4e39fa44f71df04b74f123f4.png)
15-16高二下·上海杨浦·期中 查看更多[4]
上海市复旦大学附属中学2015-2016学年高二下学期期中数学试题(已下线)专题4.5 简单几何体【压轴题型专项训练】-2020-2021学年高二数学下学期期末专项复习(沪教版)(已下线)第10讲 柱、锥、台的表面积(核心考点讲与练)-2022-2023学年高二数学考试满分全攻略(沪教版2020必修第三册)(已下线)第二章 立体几何中的计算 专题三 空间面积的计算 微点2 空间面积的计算综合训练【基础版】
更新时间:2020-01-13 06:47:02
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解答题-证明题
|
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【推荐1】如果一个正四棱柱与一个圆柱的体积相等,那么我们称它们是一对:“等积四棱圆柱”.将“等积四棱圆柱”的正四棱柱,圆柱的表面积与高分别记为
与
.
(1)若
,求
的值.
(2)若
,求证:
;
(3)求实数
的取值范围,使得存在一对“等积四棱圆柱”,满足
与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2872c7017fa524f541698be177ec80c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b49cf76b4f6badb0e6bbe222ad84e5d.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8c1db3caa89156f2cd0e74393a5895e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c84f27e920fe12854e85c6aa2533a8bf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e25402540142dc030c0666839fc7287.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79dc44b2fafa2b4e6ba0cd543302bfa0.png)
(3)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edbaf18914596f229d15f9811d1d6edc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae4185929825f622b1b8b396af51f38.png)
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【推荐2】如图,在三棱柱
中,侧面
底面
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/16/cc5d20f0-b18a-4c32-bf05-a3453bb81c4e.png?resizew=209)
(1)求证:
;
(2)求三棱柱
的侧面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0671b4776e142e17a79af5b3f0378ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc17c7b2f956334f7e79f0cfe8d6ce76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/051128348c7ec62e73e2ab285683b7ae.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/16/cc5d20f0-b18a-4c32-bf05-a3453bb81c4e.png?resizew=209)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/454836fef724385d7930bfb67c60b611.png)
(2)求三棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
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【推荐3】蜂房是自然界最神奇的“建筑”之一,如图1所示.蜂房结构是由正六棱柱截去三个相等的三棱锥
,
,
,再分别以
,
,
为轴将
,
,
分别向上翻转
,使
,
,
三点重合为点
所围成的曲顶多面体(下底面开口),如图2所示.蜂房曲顶空间的弯曲度可用曲率来刻画,定义其度量值等于蜂房顶端三个菱形的各个顶点的曲率之和,而每一顶点的曲率规定等于
减去蜂房多面体在该点的各个面角之和(多面体的面角是多面体的面的内角,用弧度制表示).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/a92b50df-d218-42a5-9a1b-745e46427d6b.png?resizew=452)
(1)求蜂房曲顶空间的弯曲度;
(2)若正六棱柱的侧面积一定,当蜂房表面积最小时,求其顶点
的曲率的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/653c6425ba284719913a5ba89b76d148.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22678c6aa7bc1b372fa8f46a596be59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db8eccace9994691c9219e098b574c65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17eba1a234a34ceeb44bcd15216a2866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d218d925d9bdfbafd000c5cbd7787d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5ec26174ee387a474d3e264ff2e9205.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfe639eab78eafd2d40ea70aa5d3f21d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67716ac738ee2911a69bf4063110a5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e9fdc1f8ed0ae44b54a9a2a3aca2db4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/a92b50df-d218-42a5-9a1b-745e46427d6b.png?resizew=452)
(1)求蜂房曲顶空间的弯曲度;
(2)若正六棱柱的侧面积一定,当蜂房表面积最小时,求其顶点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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【推荐1】如图,在四面体
中,
分别是线段
的中点,
.
(1)证明:
平面
;
(2)是否存在
,使得平面
与平面
的夹角的余弦值为
?若存在,求出此时
的长度;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/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28a77aa6c27acfffcc601d9ca7e6d4c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c545841013f55b10e2c93943618fe776.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/20/938e0e2b-b4f4-4e97-bdb6-f44e8c097fb1.png?resizew=147)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)是否存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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【推荐2】如图,已知等腰梯形
的外接圆圆心
在底边
上,
,
,
,点
是上半圆上的动点(不包含
,
两点),点
是线段
上的动点,将半圆
所在的平面沿直径
折起,使得平面
平面
.
平面
时,求
的值;
(2)证明:
不可能垂直
;
(3)设
与平面
所成的角为
,二面角
的平面角为
(其中
),求
的最大值.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73e01d3d6bd865e16908eb08dec78f73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a6241af8eadb720f601ee48f74cb9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745e0525a41fe2e2a7739c75a942290b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b70cef0b79ca64acbb67dc667fc53b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df7fdfebdbaddc49e8991ec47d2fb076.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9350ccf7500c62835c27f4b946b6db58.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf702adb116c1e46569eb7050d029f49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84ea10539215794cd76e8b211abd503f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1cd47260d190dc5b89e5303879ab164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/628560d39eeb0339fa00c9c15ab2c095.png)
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【推荐3】如图,把以
为底边的等腰
绕着它的一条腰
旋转到
的位置,使得
为正三角形,且
,
,
、
为线段
、
上的点,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/1/9f6b4906-4318-4bab-8c40-c259ee1ec83e.png?resizew=210)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
平面
;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ab5c45a72849d2cae1d65b282b5bd19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecea6ac9e782b5f11e23b025d5ee195a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee98a0cb286c6323b0285e021024d4e7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/1/9f6b4906-4318-4bab-8c40-c259ee1ec83e.png?resizew=210)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca6d1c5eace748465b2dad5065f5111c.png)
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