解题方法
1 . 在正方体
中,球
同时与以
为公共顶点的三个面相切,球
同时与以
为公共顶点的三个面相切,且两球相切于点
.若以
为焦点,
为准线的抛物线经过
,设球
的半径分别为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4f6f74444b2b7947fc6e35c8d62322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba7cbaf0425d4a7b580638856610e259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba7cbaf0425d4a7b580638856610e259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/366ab54460ebf596ee7c7d96e794c800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3ec1ff9f2eb61dcce94f093c64b9c2a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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4卷引用:河南省信阳市实验高级中学2021-2022学年高三开学分班考试数学(理科)试题
解题方法
2 . 已知直角
,
,
,
,
分别是
的中点,将
沿直线
翻折至
,形成四棱锥
.则在翻折过程中,①
;②
;③
;④平面
平面
.不可能成立的结论是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2f39d3fcb1664705228e683c2cc3b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b65065ec3a0cb4b050989165c003d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f460edcced5597615113c0fdc95b1dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f32cec7a97884ee6cdf106b312485482.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede9e40f5cf450db6f01194559a19c7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/743e93650b430317090e3f3b632a8d4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac2ef99db257cc1acb08e3a5e0006d49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ea4d1a88e0b7065ed99ed24b921f434.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ac48b9ac8efbf41d6ab5242d247bd89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
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2020高二·浙江·专题练习
名校
3 . 如图,等腰三角形
中,
,
,
,且
平面
,若
则
的最小值为______ .
![](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/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9d7bd6df0e94731edb8f4649903de73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84be64d28b1623e71ad989f37336b1f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/952cee815a255c1cb7b5fcde6b032cd6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/35bd9ee7-6a4c-49c8-bf6b-a39994a6c114.png?resizew=179)
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名校
4 . 某三棱锥的三视图如图所示,则该棱锥的表面积为
![](https://img.xkw.com/dksih/QBM/2019/7/1/2237668031897600/2240146657648640/STEM/9f8e330c-e7c7-442b-b333-7f582b8b41fa.png?resizew=207)
![](https://img.xkw.com/dksih/QBM/2019/7/1/2237668031897600/2240146657648640/STEM/9f8e330c-e7c7-442b-b333-7f582b8b41fa.png?resizew=207)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
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2019高三下·全国·专题练习
名校
5 . 已知三棱锥
的外接球
的半径为
,底面
为正三角形,若顶点
到底面
的距离为
且三棱锥
的体积为
,则顶点
的轨迹长度是______ .
![](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/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae35b36548a8c515a0b7a00e5e2024a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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河南省信阳市新县高级中学2023届高三第一轮适应性考试(二)数学(理科)试题(已下线)2019年5月2019届高三第三次全国大联考(新课标Ⅰ卷)-理科数学重庆市綦江中学2021届高三下学期5月考前模拟数学试题
2014·甘肃兰州·一模
6 . 平行四边形
中,
,沿
将四边形折起成直二面角
,且
,则三棱锥
的外接球的表面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd491d367eb613a744a8682b2d4d9644.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f1854ba6cc92481d7a616bd2788a47e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f193dbc22cb5bf7162c04010cf56749a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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|
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名校
7 . 已知球
是正三棱锥(底面为正三角形,顶点在底面的射影为底面中心)
的外接球,
,
,点
在线段
上,且
,过点
作球
的截面,则所得截面圆面积的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26c4b68aad796dc9d5bf51fe604b61e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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6卷引用:【全国百强校】河南省信阳高级中学2019届高三上学期期末考试数学(文)试题
8 . 如图所示,某几何体由底面半径和高均为5的圆柱与半径为5的半球面对接而成,该封闭几何体内部放入一个小圆柱体,且圆柱体的上下底面均与外层圆柱的底面平行,则小圆柱体积的最大值为( )
![](https://img.xkw.com/dksih/QBM/2019/4/28/2192016181633024/2192052739014656/STEM/589b9abce0eb4d2794293071c39242e5.png?resizew=118)
![](https://img.xkw.com/dksih/QBM/2019/4/28/2192016181633024/2192052739014656/STEM/589b9abce0eb4d2794293071c39242e5.png?resizew=118)
A.![]() | B.![]() | C.![]() | D.![]() |
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|
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8卷引用:河南省信阳市2020-2021学年高三上学期调研考试(12月)理科数学试题
河南省信阳市2020-2021学年高三上学期调研考试(12月)理科数学试题河南省信阳市信阳高级中学2020-2021学年高三上学期12月月考数学试题【全国百强校】河北省衡水中学2018—2019学年高三年级上学期四调考试数学(理)试题【市级联考】甘肃省张掖市2019届高三第三次诊断考试数学(文)试题(已下线)1.4 生活中的优化问题举例-2020-2021学年高二数学(理)课时同步练(人教A版选修2-2)(已下线)【新教材精创】6.3 利用导数解决实际问题 -A基础练(已下线)专题三 立体几何检测-2022年高考数学二轮复习讲练测(新教材·新高考地区专用)(已下线)类型一 空间几何题-【题型突破】备战2022年高考数学二轮基础题型+重难题型突破(新高考专用)
名校
9 . 如图,三棱锥的所有顶点都在一个球面上,在△ABC中,AB=
,∠ACB=60°,∠BCD=90°,AB⊥CD,CD=
,则该球的体积为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://img.xkw.com/dksih/QBM/2018/2/28/1892119677173760/1895770480402432/STEM/a1b0e5b41d88446d86f16ee672518c3d.png?resizew=152)
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2018-01-19更新
|
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|
4卷引用:河南省信阳高级中学2017-2018学年高二下学期开学考试数学(理)试题
名校
10 . 如图所示的几何体中,四边形ABCD是等腰梯形,AB//CD, ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2abbf9f692b6ed2cb5bff108fd9e8b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7265797582ffa650d8a7dd528467b086.png)
,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ea30c4e5f1b1c19df1ac2f388db93da.png)
![](https://img.xkw.com/dksih/QBM/2019/2/11/2138416022528000/2139689374154752/STEM/9d889558aa124fbd9b383db8488c9a2b.png?resizew=233)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa75cbb03d8a2bab8e4164b5ad6a918d.png)
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2abbf9f692b6ed2cb5bff108fd9e8b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7265797582ffa650d8a7dd528467b086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53c51c25b65a37b676ae3c3b71c29f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ea30c4e5f1b1c19df1ac2f388db93da.png)
![](https://img.xkw.com/dksih/QBM/2019/2/11/2138416022528000/2139689374154752/STEM/9d889558aa124fbd9b383db8488c9a2b.png?resizew=233)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa75cbb03d8a2bab8e4164b5ad6a918d.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53bbf403747623f21f773ce1e961ee09.png)
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