如图,在直三棱柱
中,
,
,
点
为侧棱
上一个动点
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/67d00645-a984-4c51-ade5-336fb0f1b2c2.png?resizew=160)
(1)求此直三棱柱
的表面积;
(2)当
最小时,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a42e6e6072a673498f0f78c0c429a93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/67d00645-a984-4c51-ade5-336fb0f1b2c2.png?resizew=160)
(1)求此直三棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dc9f21fbb1e0b474126b93db8fdf29e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a57dfb78e8579cc68dbfca90f80a1c5.png)
17-18高二上·江苏无锡·期中 查看更多[3]
江苏省无锡市第一中学2017-2018学年高二上学期期中数学试题(已下线)考点24 空间几何体体积及表面积(讲解)-2021年高考数学复习一轮复习笔记四川省峨眉第二中学校2022-2023学年高二上学期10月月考理科数学试题
更新时间:2020-04-23 13:24:08
|
相似题推荐
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】长方体
中底面
是边长为
的正方形,
是棱
的中点,
是棱
的中点,若长方体
的全面积为
.
(1)求长方体
的高
;
(2)求异面直线
与
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b72ac611ae66b86761e080761d9aabc.png)
(1)求长方体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b7d857811cbd619f868d951aa7a0ab8.png)
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【推荐2】如果球、正方体与等边圆柱(底面直径与母线相等)的体积相等,求它们的表面积
的大小关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52640856f31d04221b41f3023cd4239f.png)
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【推荐1】如图,在四边形
中,
,且
,点E是线段
上靠近点A的一个三等分点,以
为折痕将
折起,使点A到达点
的位置,且
.
![](https://img.xkw.com/dksih/QBM/2020/12/27/2623089038049280/2624115248750592/STEM/803d7cb7-672d-4c26-a9e4-31065c1dba2b.png?resizew=347)
(1)证明:平面
平面
.
(2)求四棱锥
的体积与棱
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/367d1ef65d82b87c9117ba82ce22e74b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae464101a6c5a52fda19f0860366fbb8.png)
![](https://img.xkw.com/dksih/QBM/2020/12/27/2623089038049280/2624115248750592/STEM/803d7cb7-672d-4c26-a9e4-31065c1dba2b.png?resizew=347)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7b3e7c7845a0ec3cbac709fda131764.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2db2b1c641b93caae9b7a82441e4ba70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
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(0.65)
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解题方法
【推荐2】如图四棱锥
,点
在圆
上,
,顶点
在底面的射影为圆心
,点
在线段
上.
(1)若
,当
//平面
时,求
的值;
(2)若
与
不平行,四棱锥
的体积为
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c82a10b4f0c9323d726804c89dd9548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b68b96377a7555948386c5501be797f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/4/b00b11ca-ccb9-4e58-b057-5959e9e71bc8.png?resizew=208)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/357574d7e0c53a779539efa8ee7898d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)若
![](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/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8246ca2f911c5883749db3a4afcbd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
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解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】如图,AB是
的直径,PA垂直于
所在的平面,C是圆周上不同于A,B的一点,E,F分别是线段PB,PC的中点,
,
,
.
(1)求证:
平面AEF;
(2)求证:
平面PAC;
(3)求点P到平面AEF的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f45619a06a44d4a292d90aedb8cecf51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbde174e69a0ce703629c25078b383c2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/1/d092cd68-b8a8-4ea0-9cb8-7403077fbc38.png?resizew=167)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08f8b463fcecf0a757f386db56e074d9.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
(3)求点P到平面AEF的距离.
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解题方法
【推荐2】四棱锥
如图所示,其中四边形ABCD是直角梯形,
,
,
平面ABCD,
,AC与BD交于点G,
,点M线段SA上.
![](https://img.xkw.com/dksih/QBM/2020/8/15/2528240295264256/2531127758282752/STEM/209041472d084b75b7463905121b9132.png?resizew=222)
(1)若直线
平面MBD,求
的值;
(2)若
,求点A到平面SCD的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a0e5697eca3f5205cb7b343648240bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c83f8945042b9c8fb2fbdac9308d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2c410acaeb3a4f853cc0d3930ed8eaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abb5202a37e8291923ef9879a5f953e1.png)
![](https://img.xkw.com/dksih/QBM/2020/8/15/2528240295264256/2531127758282752/STEM/209041472d084b75b7463905121b9132.png?resizew=222)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a829577bb0863d3f39db38ca4c179a56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80b98851cd97e52ae204272ab60a0a4c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e3b3d73ff96882a0fb4d025ecc5669d.png)
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(0.65)
名校
解题方法
【推荐3】如图,在四棱锥
中,
底面
,
,
,
.
(1)若
是
的中点,求证:
平面
;
(2)
、
是棱
的两个三等分点,求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8e7cedc39297d66dbb177f2a1f6bee2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c42bce098904b241986bb91c65ab33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b405cbf01e3a08880eebe4af89da2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/702fa2977bc6f25103657d8af470b747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4b798f9bb5482f0a3cfa1bfd77d245.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53569e6ec795658b4fffcddeebe0f142.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192cbe130dd9ddbe4bfcf56d51450936.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/7/3b5bffd1-31c5-40b9-afb1-e5faacbb079c.png?resizew=161)
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