名校
1 . 如图,在四棱锥
中,
平面ABCD,
,
,且
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2022/5/19/2982645852889088/2985659018854400/STEM/1dc39f2f-1571-41c1-900d-cd4ac59731f8.png?resizew=187)
(1)求证:
;
(2)在线段PD上是否存在一点M,使二面角
的余弦值为
?若存在,求三棱锥
体积;若不存在,请说明理由.
![](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/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7788830ed1cb3b9c5988f70f43595f2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://img.xkw.com/dksih/QBM/2022/5/19/2982645852889088/2985659018854400/STEM/1dc39f2f-1571-41c1-900d-cd4ac59731f8.png?resizew=187)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bafa8c14100a4f847b41b9148954116c.png)
(2)在线段PD上是否存在一点M,使二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/698335f4880c7a298f4898c83b6562bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55176f6357df50f85d36b732e31972d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5d90f940f5693b22ddf2e7c761887d8.png)
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|
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2卷引用:广西南宁市第二中学2022届高三5月诊断数学(理)试题
21-22高一·全国·课前预习
名校
2 . 一个正三棱台的上、下底面边长分别为3和6,侧棱长为2,则其高为( )
A.![]() | B.1 | C.![]() | D.![]() |
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2022-05-19更新
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6卷引用:广西壮族自治区防城港市2023届高三下学期4月第三次联合调研数学(文)试题
广西壮族自治区防城港市2023届高三下学期4月第三次联合调研数学(文)试题广西桂林市、崇左市2023届高三一模数学(文)试题广西南宁市第三中学2021-2022学年高一下学期期末考试数学试题(已下线)8.3简单几何体的表面积和体积(第1课时)(导学案)原卷版-2021-2022学年高一数学同步备课 (人教A版2019 必修第二册)(已下线)第06练 基本立体图形及其表面积与体积-2022年【暑假分层作业】高一数学(苏教版2019必修第二册)陕西省西安市电子科技中学2022-2023学年高一下学期期中数学试题
名校
解题方法
3 . 如图,在三棱柱
中,侧棱
底面
,
,
,
、
分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/2022/5/6/2973578039050240/2974952549974016/STEM/23a437f9-0766-410e-8a40-147337ab112b.png?resizew=188)
(1)证明:
平面
;
(2)试探究三棱锥
的体积与三棱锥
的体积之比是否为定值,若是定值,再进一步求出此定值;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ecbfc700f5b996ac9b689e6dfa48a87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d97e150793ad48c641db0cc74aaa341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebbe2ffa2eaf64721abf61e5545cf1a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655cc150ddc9deba2254780984d0024.png)
![](https://img.xkw.com/dksih/QBM/2022/5/6/2973578039050240/2974952549974016/STEM/23a437f9-0766-410e-8a40-147337ab112b.png?resizew=188)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38b87777526f344ab7d7af4b16591131.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(2)试探究三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/becc01065291effc34c25b261c512bdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dfe6c18e5f060805c7fe2ed2592679a.png)
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2022-05-08更新
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4卷引用:广西南宁市第二中学2022届高三5月诊断数学(文)试题
4 . 某几何体的三视图如图所示,则该几何体的外接球表面积是________ .
![](https://img.xkw.com/dksih/QBM/2022/4/27/2967030506577920/2969905948180480/STEM/c57034b8-e50e-4062-81d9-95d07175676b.png?resizew=140)
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5 . 如图,A,B是两个形状相同的杯子,且B杯高度是A杯高度的
,则B杯容积与A杯容积之比最接近的是( )
![](https://img.xkw.com/dksih/QBM/2022/4/27/2967030498451456/2967930024165376/STEM/dfd22dc6-5609-48bc-9ca0-92ccb1ca492d.png?resizew=181)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
![](https://img.xkw.com/dksih/QBM/2022/4/27/2967030498451456/2967930024165376/STEM/dfd22dc6-5609-48bc-9ca0-92ccb1ca492d.png?resizew=181)
A.![]() | B.![]() | C.![]() | D.![]() |
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2022-04-28更新
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3卷引用:广西2022届高三4月大联考数学(理)试题
6 . 如图1的平行四边形ABCD中,点E为边AB的中点,AB=2,AD=1,∠DAB=60°,现将△ADE沿DE折起,使点A到达点P的位置,得到四棱锥P-BCDE(如图2),使得PC=2.
![](https://img.xkw.com/dksih/QBM/2022/4/21/2962989822238720/2964256605618176/STEM/bf4609dd052f408eb0b9d96ec4c98ffb.png?resizew=378)
(1)证明:CE⊥平面PED;
(2)求三棱锥P-CDE的体积.
![](https://img.xkw.com/dksih/QBM/2022/4/21/2962989822238720/2964256605618176/STEM/bf4609dd052f408eb0b9d96ec4c98ffb.png?resizew=378)
(1)证明:CE⊥平面PED;
(2)求三棱锥P-CDE的体积.
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3卷引用:广西柳州高级中学、南宁市第二中学2023届高三上学期9月联考数学(文)试题
解题方法
7 . 如图,在三棱柱
中,平面
平面
,
平面
,
.
![](https://img.xkw.com/dksih/QBM/2022/4/13/2957149452943360/2958088611946496/STEM/5682f91e-d3fc-4e8e-80a4-2397d0de1971.png?resizew=181)
(1)若
,求证:
;
(2)若四棱锥
的体积是
,求
的最小值.
![](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/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://img.xkw.com/dksih/QBM/2022/4/13/2957149452943360/2958088611946496/STEM/5682f91e-d3fc-4e8e-80a4-2397d0de1971.png?resizew=181)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e97770c3777724f1682b555371e9277.png)
(2)若四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10945fc371bb860d675088f01b491720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
您最近一年使用:0次
8 . 如图,
的外接圆⊙
的半径为
,
⊙
所在的平面,
,
,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/22/240c5ccc-e9a2-4ca9-9406-0bb0d11e438a.png?resizew=169)
(1)求证:平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d78fc7fcb2762de28dcef8aa3aa0e49.png)
平面
;
(2)求几何体
的体积;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3dc3d90beb344a2a154a90009b51bcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daffba23d64529e8c8fac0424e7c5893.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adc90c2d45477e166b02359525f40aa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c65c5267eff44141c4da721280db3cf1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/22/240c5ccc-e9a2-4ca9-9406-0bb0d11e438a.png?resizew=169)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d78fc7fcb2762de28dcef8aa3aa0e49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
(2)求几何体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
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名校
解题方法
9 . 已知一个三棱锥的三视图如图所示,正视图为正方形,侧视图和俯视图均为直角三角形,则该几何体的体积是( )
![](https://img.xkw.com/dksih/QBM/2022/4/6/2952476810829824/2952971693842432/STEM/4072fafb-a356-445e-9ded-ee9090f5c3e8.png?resizew=166)
![](https://img.xkw.com/dksih/QBM/2022/4/6/2952476810829824/2952971693842432/STEM/4072fafb-a356-445e-9ded-ee9090f5c3e8.png?resizew=166)
A.12 | B.2 | C.4 | D.6 |
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2022-04-07更新
|
712次组卷
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4卷引用:广西柳州高级中学、南宁市第二中学2023届高三上学期9月联考数学(理)试题
名校
解题方法
10 . 在棱长为1的正方体
中,M为底面ABCD的中心,
,
,N为线段AQ的中点,则下列命题中正确的个数为( ).
![](https://img.xkw.com/dksih/QBM/2022/2/23/2922675183230976/2936974369316864/STEM/80e4eab2-8506-48a5-87e2-e4005edcaf68.png?resizew=177)
①CN与QM共面;
②三棱锥
的体积跟
的取值无关;
③当
时,过A,Q,M三点的平面截正方体所得截面的周长为
;
④
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67f573e71c24681607fd68af56a06188.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eb6bf23a5a12e1ba5413594d7b1a57c.png)
![](https://img.xkw.com/dksih/QBM/2022/2/23/2922675183230976/2936974369316864/STEM/80e4eab2-8506-48a5-87e2-e4005edcaf68.png?resizew=177)
①CN与QM共面;
②三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9933c392d85e51aba78e72468363579b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1c3ea872a20fdc1843cb5ffce8a554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe4f6553b387f1576e4718bf60b601b4.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f83464bf17f9d4d9ee6a7f299539871.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04788d23a49a7025c8375c25d923a7c8.png)
A.1 | B.2 | C.3 | D.4 |
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2022-03-15更新
|
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4卷引用:广西名校2022届高三第一次联合考试数学(文)试题