23-24高三上·福建·期中
1 . 如图,在四棱锥
中,
为等边三角形,
为
的中点,
,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/22/e45bb5a3-01f3-4e09-b043-d57738a5b746.jpg?resizew=182)
(1)证明:平面
平面
;
(2)若
,
,
,直线
与平面
所成角的正弦值为
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/545e18836bc7fee22f8f813a6f525d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/22/e45bb5a3-01f3-4e09-b043-d57738a5b746.jpg?resizew=182)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75463911a178c1425bf65787589ad03d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a9f2a9caa28a5266b12188771c6ace4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f35614aff055b98b76ca262f64e629d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdf91e7449e859f06f73cf6d487d75f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d9d0e698b54e331467bf6c2842ea2ac.png)
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解题方法
2 . 如图,正方体
的棱长为1,线段
上有两个动点E,F,且
,则下列结论中正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e438a162ed349f7f25333e8f6c044e6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/15/868a0872-98b3-4366-8831-0617ac11ff39.png?resizew=163)
A.当E点运动时,![]() |
B.当E向![]() ![]() |
C.二面角![]() |
D.![]() ![]() ![]() |
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3 . 一副三角板由两个直角三角形组成,如图所示,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5158a1cea978edcdd6cbaface415bbc.png)
且
,现将两块三角板拼接在一起,得到三棱锥
,取
和
中点
、
,则下列判断中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/15/7d31a959-728e-4f2f-b27d-5c70c9ad202c.png?resizew=319)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5158a1cea978edcdd6cbaface415bbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c1ef93befe86e3115b654cb872d9722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5adc18ca424552b35ab939e9d57943e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a94c78d07395bd0379acf93e0a334b7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/15/7d31a959-728e-4f2f-b27d-5c70c9ad202c.png?resizew=319)
A.直线![]() ![]() |
B.三棱锥![]() |
C.![]() ![]() |
D.设面![]() ![]() ![]() ![]() |
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2023-11-15更新
|
645次组卷
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5卷引用:福建省“宁化、永安、尤溪、大田、沙县一中”五校协作2024届高三上学期11月联考数学试题
福建省“宁化、永安、尤溪、大田、沙县一中”五校协作2024届高三上学期11月联考数学试题福建省莆田市第六中学2024届高三上学期1月质检模拟数学试题(已下线)考点17 立体几何中的定值问题 2024届高考数学考点总动员【讲】广东省深圳市福田中学2024届高三上学期第三次月考数学试题(已下线)第二章 立体几何中的计算 专题一 空间角 微点5 直线与平面所成角综合训练【培优版】
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4 . 已知正四棱柱
的底面边长为1,侧棱长为2,点
为侧棱
上的动点(包括端点),
平面
.下列说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0edb1508fc95765f3bb316bcb5252d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
A.异面直线![]() ![]() |
B.直线![]() ![]() |
C.![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() |
您最近一年使用:0次
2023-11-14更新
|
260次组卷
|
3卷引用:福建省福州第三中学2023-2024学年高二上学期11月期中数学试题
5 . 如图,在四棱锥
中,
底面
,底面
是直角梯形,
,
,
,
是
的中点.
(1)求证:
平面
;
(2)若二面角
的余弦值为
,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/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fd3c2e2199cd4565c05b949bc21fc37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/13/505ca1b6-0de8-49a2-896d-9b29a5425143.png?resizew=177)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5102c216393e133fa25dba98cd78535.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca48c18021e7be4bbb3e95576e1c1b5f.png)
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6 . 已知正方体的
棱长为2,点M,N分别是棱
,
的中点,点P在平面
内,点Q在线段
上,若
,则
长度的最小值为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a604466a9c8d10d557b3dfc43b547065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90dd18184d12e9c1d8d1fca40973166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/5/8c96f02a-0260-4495-9a16-4f17045a4ec3.png?resizew=146)
您最近一年使用:0次
2023-11-13更新
|
364次组卷
|
13卷引用:福建省厦门市杏南中学2023-2024学年高二上学期11月期中阶段测试数学试题
福建省厦门市杏南中学2023-2024学年高二上学期11月期中阶段测试数学试题安徽省蚌埠第三中学2019-2020学年高二上学期期中数学(理)试题【全国百强校】山西省大同市第一中学2017-2018学年高二5月月考数学(理)试题广东省茂名市五校联盟2021届高三上学期第一次联考数学试题(已下线)类型二 空间点、线、面的位置关系-【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)海南省文昌中学2022届高三4月段考数学试题北京市师大附中2022-2023学年高二上学期数学期末试题贵州省遵义市第二教育集团2021-2022学年高二上学期期末联考数学(理)试题人教B版(2019) 必修第四册 北京名校同步练习册 第十一章 立体几何初步 本章测试江西省泰和中学2023届高三一模文科数学试题江西省泰和中学2023届高三一模理科数学试题贵州省遵义市第二教育集团2021-2022学年高二上学期期末联考数学(文)试题(已下线)第二章 立体几何中的计算 专题七 空间范围与最值问题 微点8 空间范围与最值问题综合训练
解题方法
7 . 如图,在三棱柱
中,底面是边长为
的等边三角形,
,
,
分别是线段
的中点,平面
⊥平面
.
(1)求证:
平面
;
(2)若点
为线段
上的动点,求平面
与平面
的夹角的余弦值的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d8cb98c0adee7ca698d8b17dacb845b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93375ca41cdaac319b79f05108f7fc24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d06f8edd1a1f18ca2dae700c6a29ab4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b86d1a82c4e165826ff63c01fca82b8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/5/4de463e5-50f4-4e20-a190-22646382758e.png?resizew=166)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26d8a9d64ad3c8cba28840b41ed7837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
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8 . 在三棱柱
中,四边形
是菱形,
,平面
平面
,平面
与平面
的交线为l.
(1)证明:
;
(2)已知
上是否存在点
,使
与平面
所成角为
?若存在,求
的长度;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce04b35c265cc9c48b60204bd2f718ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a211ad5a06b505b8365a62c1946f3cb7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/3/9c494202-f303-4309-861c-7eaff65f064f.png?resizew=155)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3f35646cb29fafd1e1a214b69e4f22d.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ec9325eb4cf2b1d09d6be7c526cac67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4d781525777c7b5284dffc70b2a28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655c413f509068d30b165f9d92bdba0.png)
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9 . 在图1中,
,
,
为等边三角形,O为AC边的中点,E在BC边上,且
,沿AC将
进行折叠,使点D运动到点F的位置,如图2,连接FO,FB,FE,
.
(1)证明:
平面ABC.
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb4957406b21df59fdf7fa184752287b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de01ca42a21f0cb44b2c914e092a0d85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c545be1051b20aea348bc99505c27022.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/2/0f9d71fd-47ab-4028-928c-d7a82185fead.png?resizew=298)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/befd9ccddb75aeb71cd1a008669f34da.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7289950468c026d5ceac17a79334dfe9.png)
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2023-11-10更新
|
501次组卷
|
3卷引用:福建省福州第一中学2024届高三上学期第一学段期中考试数学试题
10 . 如图,已知圆柱母线长为2,底面圆半径为1,
为下底面圆圆心,A,B是下底面圆周上的点,且
.若点C是圆柱表面上的动点,且满足
,则点C运动轨迹长为_______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ff5c21185c13eae675906dabd3593c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91942670354affa8d52edadbcfa762bc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/3/bc6d7eb0-9746-4672-8958-0c527c0af695.png?resizew=104)
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