2010·河北·一模
名校
1 . 如图,在三棱锥
中,已知
是正三角形,
平面BCD,
,E为BC的中点,F在棱AC上,且
.
![](https://img.xkw.com/dksih/QBM/2019/1/25/2126456712134656/2128457404456960/STEM/3f2ce8d5322e4d7db171046fefab7b96.png?resizew=163)
求三棱锥
的表面积;
求证
平面DEF;
若M为BD的中点,问AC上是否存在一点N,使
平面DEF?若存在,说明点N的位置;若不存在,试说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/446983c2905a9a039e04eb6541fc2b2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b506b0941433a6a5d5387d0ec95596ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba1ff2afbc771a6708ca771f450b1997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bbf2472e31fdc5502c45901a3723759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a7c85cdb5e873721700146cc9084373.png)
![](https://img.xkw.com/dksih/QBM/2019/1/25/2126456712134656/2128457404456960/STEM/3f2ce8d5322e4d7db171046fefab7b96.png?resizew=163)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/446983c2905a9a039e04eb6541fc2b2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee2b198824daf85c88054bda90664231.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4bb89a362c1faf4d0c306eabbb59710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd19c4db61254be8512edf741bf9f978.png)
您最近一年使用:0次
2016-12-02更新
|
1054次组卷
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6卷引用:安徽省阜阳市红旗中学2018-2019学年高一第一学期期末考试试题数学(理科)试题
安徽省阜阳市红旗中学2018-2019学年高一第一学期期末考试试题数学(理科)试题(已下线)正定中学2010高三下学期第一次考试(数学理)(已下线)2013届辽宁沈阳二中等重点中学协作体高三领航高考预测(一)文数学卷(已下线)2013届江西省南昌一中、南昌十中高三第四次联考文科数学试卷(已下线)2013届吉林省四校联合体高三第一次诊断性测试理科数学试卷人教A版(2019) 必修第二册 逆袭之路 第八章 立体几何初步 本章整合提升
2 . 已知三棱锥
所有顶点都在半径为2的球面上,
面ABC,
,
,则三棱锥
的体积最大值为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/ef2c7582-0684-4b15-ab31-d540d2216faf.png?resizew=173)
您最近一年使用:0次
名校
解题方法
3 . 已知三棱锥
的四个顶点都在球
的球面上,且球
的表面积为
,
,
平面
,
,则三棱锥
的体积为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61fdb4a700641d17886052d20d7d84ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87dc2ccc39c16ba9cb647e62f08387f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
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2019-07-29更新
|
287次组卷
|
5卷引用:安徽省滁州市九校联谊会2018-2019学年高二下学期期末联考数学(理)试题(滁州二中、定远二中等11校)
4 . 已知某几何体的三视图
单位:
,如图所示,则此几何体的外接球的体积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/ec56d9f9-467b-4d87-8bb9-b22147123844.png?resizew=166)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c416db00cec96cbfa662becdd0254410.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/ec56d9f9-467b-4d87-8bb9-b22147123844.png?resizew=166)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
您最近一年使用:0次
2018-12-10更新
|
416次组卷
|
2卷引用:安徽省滁州市定远县育才学校2021-2022学年高三下学期期中考试数学(文)试题
名校
5 . 如图,已知四边形
和
均为直角梯形,
,
且
,平面
平面
,
.
![](https://img.xkw.com/dksih/QBM/2017/1/20/1619466607820800/1619466608386048/STEM/22add5445d3441f58b75dc7d5665f086.png)
(1)求证:
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/693cd6179b2a92f03153ce12a0e86b95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cc3c947dc4deaf4eb5266772e43bee0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1057fba69b1554ceff580f73dbb28ff3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/693cd6179b2a92f03153ce12a0e86b95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/502fda7d60b3aa884b23094fac16ab63.png)
![](https://img.xkw.com/dksih/QBM/2017/1/20/1619466607820800/1619466608386048/STEM/22add5445d3441f58b75dc7d5665f086.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e2fef2c0e49ecae8688ca60802310e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb02b8cf678a0e9e5fdb3e3acc49f14a.png)
您最近一年使用:0次
2017-02-08更新
|
1007次组卷
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2卷引用:安徽省淮北一中、合肥六中、阜阳一中、滁州中学2018-2019学年高二上学期期末考试数学(理)试题
6 . 已知底面边长为2,侧棱长为
的正四棱柱的各顶点均在同一个球面上,则该球的表面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-10-12更新
|
294次组卷
|
2卷引用:安徽省滁州市定远县育才学校2020-2021学年高二上学期期末数学(理)试题
解题方法
7 . 如图1所示,平面多边形
中,四边形
为正方形,
,
,沿着
将图形折成图2,其中
,
为
的中点.
(Ⅰ)求证:
;
(Ⅱ)求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41d3f7d55fcbaebc4e2450ac63a3dc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55dcbe075165566acf363cd199f07ba4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03d47df6f346ff0a68636379f5ea6b85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f76b819976ca9ee7b5f2097a7b1ba5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2f1054e3a5c0fc7dca3d285108112c5.png)
(Ⅱ)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/646faad545eba4860a41cd8480b8a3c0.png)
![](https://img.xkw.com/dksih/QBM/2018/11/27/2084545037705216/2088814732754944/STEM/2480138bfa194a31996ae8a23717bc3a.png?resizew=292)
您最近一年使用:0次
2017-12-17更新
|
624次组卷
|
4卷引用:【校级联考】安徽省安庆市2018届高三下学期五校联盟考试数学(文)试题
【校级联考】安徽省安庆市2018届高三下学期五校联盟考试数学(文)试题辽宁省凌源市实验中学、凌源二中2018届高三12月联考数学(文)试题(已下线)2017-2018学年第一学期期末复习备考之精准复习模拟题高三年级(文)人教版数学试题(A卷)2019届陕西省渭南韩城市高三下学期第一次月考文数试题
名校
解题方法
8 . 如图,在三棱锥
中,
平面
,
,
分别为棱
上一点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/16/c086d471-6389-479b-9c2a-5fb8e02b812e.png?resizew=196)
(1)求证:
;
(2)当
时,求三棱锥
的表面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c46cf65da6cf1a1a7fc5c9c01bdd83a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6476880c8c4a6a9c1883d6fbb42cd33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/534c25b4b9ff9aa0cf6c05ae3a8f02f5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/16/c086d471-6389-479b-9c2a-5fb8e02b812e.png?resizew=196)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4486d52b6e410fd7b60428121d96cef.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01071e7ea0fe51f5d9912c27343db0ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
您最近一年使用:0次
2020-03-20更新
|
210次组卷
|
2卷引用:2020届安徽省安庆二、七中高三开学考试数学(理)试题
18-19高一·全国·假期作业
9 . 一个正方体的八个顶点都在半径为1的球面上,则正方体的表面积为( )
A.8 | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-12-24更新
|
242次组卷
|
3卷引用:安徽省滁州市定远县育才学校2020-2021学年高二下学期第三次月考文科数学试题
安徽省滁州市定远县育才学校2020-2021学年高二下学期第三次月考文科数学试题(已下线)步步高高一数学寒假作业:作业15空间几何体的表面积与体积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
10 . 如图,已知等腰梯形
,
,
,且
,
,垂足分别为
,
,将梯形
沿着
和
翻折使得
,
两点重合于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/cccf024e-2b5c-432b-b33a-7f498dd9b200.png?resizew=221)
(1)证明:平面
平面
.
(2)若四棱锥
的体积为
,求该四棱锥的侧面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71de7c0bdb3cb6608b3a37d668bf0823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4cb73e9d976cbfe9c590044fa69dd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e68633cbbe3cc2d0801305f81a7aa86.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/cccf024e-2b5c-432b-b33a-7f498dd9b200.png?resizew=221)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/365142f103df28eef798244d75ac4603.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d246f9eceab371ebf47a47c2f11a4ad.png)
(2)若四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48c57917fa5f847db47822fc71950aad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f83dbfddc6f98548699ed581e8c8608.png)
您最近一年使用:0次