名校
解题方法
1 . 在四棱锥
中,
平面ABCD,底部ABCD为菱形,E为CD的中点.
(1)点
是棱
的中点,求证
平面
;
(2)若∠ABC=60°,求证:
⊥平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
(1)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94270844f197d524bf1da4f1385befd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e6c2dad46a9052a4185a4f7b4ae8a2e.png)
(2)若∠ABC=60°,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/9/81220fbe-82c2-4770-a194-9e5c0527f105.png?resizew=188)
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2 . 已知三棱锥
中
两两垂直,且
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8759e236bed05ad831f89f66070a477.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0dfa72f9c88567f58a8100c497326f.png)
A.二面角 ![]() ![]() |
B.三棱锥![]() ![]() |
C.![]() ![]() ![]() ![]() |
D.![]() ![]() ![]() ![]() ![]() |
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2卷引用:山西省长治市第二中学校2021-2022学年高一下学期期末数学试题
名校
3 . 在空间,若直线
与平面
所成角为
,则
( )
A.![]() | B.![]() | C.![]() | D.![]() |
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4 . 如图,在圆锥
中,
,
,圆锥底面圆的面积为
,则其外接球的表面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/8/a5197c6c-6f07-4c22-974d-456d30a4d319.png?resizew=139)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32fb50c66cd2de786b39cb442ec54a16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9b932047d343f940d14f893587c3603.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52604bbf2a9f4f4209a3288657707e60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e95a79288fcb7e47fba4410722e2bc6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/8/a5197c6c-6f07-4c22-974d-456d30a4d319.png?resizew=139)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 在四面体
中,平面
平面
,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a566b100fb2ebe3d208f9b6527934218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91d1bc2befb2ed08809390b008bbfe26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f63d194aa0d4091618b6f41f569ee2.png)
A.![]() | B.![]() | C.4 | D.![]() |
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3卷引用:山西省长治市2021-2022学年高一下学期期末联考数学试题
山西省长治市2021-2022学年高一下学期期末联考数学试题贵州省黔西南州2021-2022学年高二下学期期末质量检测数学(文)试题(已下线)核心考点08空间直线、平面的垂直-【满分全攻略】2022-2023学年高一数学下学期核心考点+重难点讲练与测试(人教A版2019必修第二册)
6 . 如图,正四棱台
的上、下底面边长分别为2,
分别为
的中点,8个顶点
构成的十面体恰有内切球,则该内切球的表面积为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c771f1a5969765dc577dfb73d992860.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a337a934b801730321f67b0e5a0b144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b037ef966c399454343d628e627c2ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/6/ef5e9b4a-8aae-4449-942e-348e52384d83.png?resizew=209)
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7卷引用:山西省长治市2021-2022学年高二下学期7月调研数学试题
山西省长治市2021-2022学年高二下学期7月调研数学试题河北省保定市部分学校2021-2022学年高二下学期7月质量检测数学试题河北省张家口部分学校金科大联考2021-2022学年高二下学期7月质量检测数学试题福建省泉州市部分学校2021-2022学年高二下学期7月联合测评数学试题(已下线)广东省汕头市2023届高三第一次模拟数学试题变式题11-16(已下线)考点7 组合体的内切 2024届高考数学考点总动员(已下线)专题13 一网打尽外接球、内切球与棱切球问题 (练习)
解题方法
7 . 在等腰直角三角形
中,
,平面上有动点
,满足
,则
的最大值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c91a197c9d62a09281273d8251c1c429.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5b8b072fbe41a656a083dc5bd401a50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
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4卷引用:山西省长治市2021-2022学年高二下学期7月调研数学试题
山西省长治市2021-2022学年高二下学期7月调研数学试题河北省保定市部分学校2021-2022学年高二下学期7月质量检测数学试题河北省张家口部分学校金科大联考2021-2022学年高二下学期7月质量检测数学试题(已下线)第二章 平面解析几何之直线和圆的方程(A卷·知识通关练)(3)
8 . 如图,在直三棱柱
中,
为
上一点,平面
分三棱柱为上下体积相等的两部分,则
与
所成角的余弦值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/7/9f163cb6-5e74-4046-a45a-11d1afd9a42c.png?resizew=173)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2a4ff389266ae1136087ef711ca48dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db3ef97d64e58d311019b70fe5e2cc0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/7/9f163cb6-5e74-4046-a45a-11d1afd9a42c.png?resizew=173)
A.![]() | B.![]() | C.![]() | D.![]() |
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6卷引用:山西省长治市2021-2022学年高二下学期7月调研数学试题
名校
9 . 设
、
为不重合的平面,
、
为不重合的直线,则下列结论中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.![]() ![]() ![]() ![]() |
B.![]() ![]() ![]() ![]() |
C.![]() ![]() ![]() ![]() |
D.![]() ![]() ![]() ![]() |
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解题方法
10 . 如图所示,在三棱锥
中,
平面
,
,过点
分别作
,
,
,
分别为垂足.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/11/b3c9c1cd-e3b1-4cce-b4d4-37d5d78fe28e.png?resizew=159)
(1)求证:平面
平面
;
(2)求证:
.
![](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/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbfbaf73297240eb116f22489519895a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f392902d611863c6908a48e696e7bd8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/11/b3c9c1cd-e3b1-4cce-b4d4-37d5d78fe28e.png?resizew=159)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a4a6a1e70241d600bc6c104313eac61.png)
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