名校
解题方法
1 . 如图,在四棱锥
,底面
为平行四边形,
为等边三角形,平面
平面
,
.
(1)设
分别为
的中点,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
平面
;
(2)求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177678001b2ccde1db8f57fa5e017002.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b44f4120c94cb7176dc31fcac387b32e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/12/cc2762dd-0136-4d75-88be-a47f2bd49888.png?resizew=186)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0f3ed5ea1cf0fa8f7c6be46cd5fa057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fc9553d0fa450786b888561368b7194.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2023-09-11更新
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5卷引用:江苏省苏州市北外附属苏州湾外国语学校2019-2020学年高一下学期期末数学试题
2 . 如图,点
在正方体
的面对角线
上运动,则下列四个结论,其中正确的结论的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/13/c34ef381-6a86-4f5f-9720-504854b3f9a5.png?resizew=156)
A.三棱锥![]() |
B.![]() ![]() |
C.![]() |
D.平面![]() ![]() |
您最近一年使用:0次
2022-08-26更新
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17卷引用:江苏省苏州市工业园区星海高中2019-2020学年高一下学期期中数学试题
江苏省苏州市工业园区星海高中2019-2020学年高一下学期期中数学试题重庆市永川北山中学校2022届高三高考冲刺5数学试题(已下线)【新东方】在线数学170高一下广东省肇庆市第一中学2020-2021学年高一下学期期中数学试题江苏省苏州市吴江汾湖高级中学2020-2021学年高一下学期5月阶段性检测数学试题河北省石家庄市第一中学东校区2020-2021学年高二下学期教学质量检测(一)数学试题广东省广州市秀全中学2021-2022学年高一下学期期中数学试题吉林省延边朝鲜族自治州延边第一中学2021-2022学年高一下学期期中数学试题湖北省宜昌英杰学校2022-2023学年高二上学期9月起点考试数学试题福建省泉州市第七中学2022-2023学年高二上学期9月测试数学试题辽宁省沈阳市小三校2022-2023学年高三上学期10月月考数学试题浙江省金华市东阳市外国语学校2022-2023学年高一下学期5月月考数学试题山东省淄博市淄博第一中学2022-2023学年高二上学期10月月考数学试题陕西省铜川市宜君县高级中学2022-2023学年高一下学期期中数学试题河南省南阳市第一中学校2023-2024学年高二上学期假期质量评估数学试题(已下线)期中模拟预测卷03(测试范围:必修二前三章)-【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)(已下线)FHsx1225yl194
3 . 在长方体
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe38b985695aa1c032fd7b2ef88a8b64.png)
,E,F,P,Q分别为棱![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cfd2cfa70c66adb6440ed5f627b12ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bc307ea75bec1d37efce66ab8e1e719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff506ec404de582145f1d4c1c65e65dc.png)
的中点,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe38b985695aa1c032fd7b2ef88a8b64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6db57eca2a7cbd91bc57372592580a76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cfd2cfa70c66adb6440ed5f627b12ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bc307ea75bec1d37efce66ab8e1e719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff506ec404de582145f1d4c1c65e65dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
A.![]() | B.![]() |
C.![]() | D.直线![]() ![]() ![]() |
您最近一年使用:0次
2020-01-31更新
|
704次组卷
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8卷引用:山东省烟台市2019-2020学年高二上学期期末数学试题
名校
4 . 如图,已知
是直角梯形,且
,平面
平面
,
,
,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/2020/3/5/2413229531242496/2416047264735232/STEM/568d3f06-89f2-4803-89fb-ece44d2e3ec9.png)
(1)求证:
平面
;
(2)求平面
与平面
所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9d54cbbf601f4583659771eb534997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5bd5abb17f9b165312476bcafb74657.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c99e6d75d606b5cae9392ecca969200.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc306485b010bdec4281bc68909c08b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6f6923bc38131265bed394a3b38937e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/326a6b980171b22f89721798e76837ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2020/3/5/2413229531242496/2416047264735232/STEM/568d3f06-89f2-4803-89fb-ece44d2e3ec9.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c99cda5a272bbe32b28575fa51b9f6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62871bb0dff211fc3bd80f9066c25b29.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65277734669566578cbb7d690bb200fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
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2020-03-09更新
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2卷引用:2019届湖南省长沙市第一中学高三第一次月考数学(理)试题