名校
1 . 如图,棱锥
的底面
是矩形,
平面
,
.
![](https://img.xkw.com/dksih/QBM/2022/3/15/2936801823621120/2938759841308672/STEM/f5fc3cb1605c4fd28c6c2449d409f462.png?resizew=185)
(1)求证:
平面
;
(2)求平面
和平面
夹角的余弦值的大小.
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/324b38915c25a1bc9add6650c035bf65.png)
![](https://img.xkw.com/dksih/QBM/2022/3/15/2936801823621120/2938759841308672/STEM/f5fc3cb1605c4fd28c6c2449d409f462.png?resizew=185)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2022-03-18更新
|
6314次组卷
|
16卷引用:江苏省徐州市沛县湖西中学2024届高三上学期第四次学测模拟数学试题
江苏省徐州市沛县湖西中学2024届高三上学期第四次学测模拟数学试题甘肃省天水市甘谷第一中学2019-2020学年高二上学期第二次月考数学(理)试题河北省晋州市第二中学2020-2021学年高二上学期期中数学试题(已下线)专题09 法向量秒求-2021年高考数学二轮复习解题技巧汇总(新高考地区专用)安徽省安庆市桐城市第八中学2019-2020学年高二上学期第二次月考数学试题黑龙江省大庆中学20201-2022学年高三上学期第一次月考数学(理)试题海南华侨中学观澜湖学校2021-2022学年高二上学期期中数学试题陕西省西安中学2022届高三下学期三模理科数学试题甘肃省武威市凉州区2021-2022学年高二下学期期中质量检测数学(理)试题黑龙江省大庆市东风中学2021-2022学年高一下学期期末数学试题四川省遂宁中学校2022-2023学年高二上学期9月月考数学(文)试题(已下线)第04讲 空间直线、平面的垂直 (高频考点—精讲)-2甘肃省天水市第一中学2022-2023学年高二上学期期中数学试题吉林省白城市通榆县第一中学校2022-2023学年高二上学期期末数学试题广东省佛山市禅城实验高级中学2022-2023学年高一下学期期末数学试题河南省南阳市第一中学校2023-2024学年高二上学期12月月考数学试题
名校
2 . 如图,在多面体ABCDE中,平面ACDE⊥平面ABC,四边形ACDE为直角梯形,CD∥AE,AC⊥AE,∠ABC=60°,CD=1,AE=AC=2,F为BE的中点.
![](https://img.xkw.com/dksih/QBM/2021/5/22/2726676285562880/2731049625567232/STEM/f561ef52143742e888082d36485f450d.png?resizew=159)
(1)当BC的长为多少时,DF⊥平面ABE.
(2)求平面ABE与平面BCD所成的锐二面角的大小.
![](https://img.xkw.com/dksih/QBM/2021/5/22/2726676285562880/2731049625567232/STEM/f561ef52143742e888082d36485f450d.png?resizew=159)
(1)当BC的长为多少时,DF⊥平面ABE.
(2)求平面ABE与平面BCD所成的锐二面角的大小.
您最近一年使用:0次
2021-05-28更新
|
925次组卷
|
3卷引用:江苏省苏州市2021届高三下学期三模数学试题
解题方法
3 . 如图,在长方体
中,
相交于点
,
是线段
的中点,已知
.
![](https://img.xkw.com/dksih/QBM/2021/5/24/2728035188916224/2728088209858560/STEM/f7f43a2add1b40338677b6cf2496c413.png?resizew=231)
(1)求证:
;
(2)若
是线段
上异于端点的点,求过
三点的平面被长方体所截面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ece846a89dd043466fe5fdb0281ecb15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/281fc61cc49c139773b09da6e23e93d7.png)
![](https://img.xkw.com/dksih/QBM/2021/5/24/2728035188916224/2728088209858560/STEM/f7f43a2add1b40338677b6cf2496c413.png?resizew=231)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2996be583761b610b3458c4d3614ff27.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c685fa78d9167727179c9c032511b2ec.png)
您最近一年使用:0次
2021-05-24更新
|
347次组卷
|
2卷引用:江苏省苏州大学2021届高三下学期高考考前指导数学试题
名校
4 . 如图,四棱锥
中,
平面
,
,
,
,
,
,
平面
.
![](https://img.xkw.com/dksih/QBM/2021/5/21/2726071990599680/2726703787761664/STEM/68f4b23cec7c4fed96fa2cf6dcd28c2f.png?resizew=164)
(1)证明:
平面
;
(2)若
与平面
所成角为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27db558e8db4c957654c8e5cecd2d2dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29e240a6378adf6d23ebf9cc710c9bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02dd7f88976eb5975d31b410d0d973.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7719c24cc7a6392cb5ff7e2986cc9eb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30067b7b236d17af8a462f96a58d11bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb304d905125170bebfada27e7ed8960.png)
![](https://img.xkw.com/dksih/QBM/2021/5/21/2726071990599680/2726703787761664/STEM/68f4b23cec7c4fed96fa2cf6dcd28c2f.png?resizew=164)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780e6163118b7259daabd994d674761d.png)
您最近一年使用:0次
2021-05-22更新
|
885次组卷
|
3卷引用:江苏省扬州市2021届高三下学期5月第四次模拟考试数学试题
江苏省扬州市2021届高三下学期5月第四次模拟考试数学试题(已下线)7.4 几何法解空间角(精练)-【一隅三反】2022年高考数学一轮复习(新高考地区专用)湖北省襄阳市第四中学2022-2023学年高二上学期新起点考试数学试题
名校
解题方法
5 . 如图所示,在正方体ABCD-A1B1C1D1中,M、N分别为A1C、BC1的中点.求证:
![](https://img.xkw.com/dksih/QBM/2021/4/13/2698985168470016/2807068634955776/STEM/9fee836c-841b-4430-8cfa-e5f0dd4b7d93.png?resizew=262)
(1)MN∥平面A1B1C1D1;
(2)A1C⊥平面BDC1.
![](https://img.xkw.com/dksih/QBM/2021/4/13/2698985168470016/2807068634955776/STEM/9fee836c-841b-4430-8cfa-e5f0dd4b7d93.png?resizew=262)
(1)MN∥平面A1B1C1D1;
(2)A1C⊥平面BDC1.
您最近一年使用:0次
2021-09-13更新
|
218次组卷
|
4卷引用:2020届江苏省南通市如皋市高三下学期三模数学试题
名校
解题方法
6 . 如图,在四棱锥
中,底面
为正方形,
底面
,M为线段
的中点,
,N为线段
上的动点.
;
(2)当N为线段
的中点时,求三棱锥
的体积.
![](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/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b624742fe28db114e0554c6c87bff05c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62b587689cd46c83c260353e7098a487.png)
(2)当N为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08cd14cd2875ed363428c3e8918b74a7.png)
您最近一年使用:0次
解题方法
7 . 如图,在四棱锥
中,
平面
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/4/4/2692186318733312/2712874266771456/STEM/68d82669-40cb-4d76-9693-05549da28316.png?resizew=228)
(1)求证:平面
平面
;
(2)若
为棱
上一点(不与
,
重合),二面角
的余弦值为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ee81b6066188abee9d167b6c7f3f71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a51f54e4bffd9eb153d4713236824037.png)
![](https://img.xkw.com/dksih/QBM/2021/4/4/2692186318733312/2712874266771456/STEM/68d82669-40cb-4d76-9693-05549da28316.png?resizew=228)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/401c56f24ed0e68414e10d3af5863203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6d2fea3ab80d17eb83dd1189ca6d78e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46a56f51a6312441f9f07daf7e62ff41.png)
您最近一年使用:0次
名校
解题方法
8 . 在空间直角坐标系
中,以坐标原点
为圆心,
为半径的球体上任意一点
,它到坐标原点
的距离
,可知以坐标原点为球心,
为半径的球体可用不等式
表示.还有很多空间图形也可以用相应的不等式或者不等式组表示,记
满足的不等式组
表示的几何体为
.
(1)当
表示的图形截
所得的截面面积为
时,求实数
的值;
(2)请运用祖暅原理求证:记
满足的不等式组
所表示的几何体
,当
时,
与
的体积相等,并求出体积的大小.(祖暅原理:“幂势既同,则积不容异”.意思是:所有等高处横截面积相等的两个同高立体,其体积也必然相等)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e336d6ca2cae3d6e6c3810d7e521a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1b82ad92798b264062c062f4a9a1a5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9437ae697faa99579163106aa5a62e84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df96a0b03e385cde1b42d6b64468b51c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/848c9fd2f04fb6d9f9cec5f7c8756ca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c3ff0b0fea1cb642d3f6be77a1ff32f.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfcff373b650f57e068b74b3356a9f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c3ff0b0fea1cb642d3f6be77a1ff32f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb9c018281fcaaf52863e1f83d9dad0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
(2)请运用祖暅原理求证:记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff8b3a41fd9d00b2c99425c1f7529639.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6eaa137a2290a9a9ec7ad635d17dbb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfcff373b650f57e068b74b3356a9f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6eaa137a2290a9a9ec7ad635d17dbb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c3ff0b0fea1cb642d3f6be77a1ff32f.png)
您最近一年使用:0次
2021-04-24更新
|
775次组卷
|
5卷引用:江苏省常州市前黄高级中学2021届高三下学期5月高考适应性考试(一)数学试题
江苏省常州市前黄高级中学2021届高三下学期5月高考适应性考试(一)数学试题辽宁省“决胜新高考·名校交流“2021届高三3月联考数学试题八省名校2021届高三新高考冲刺大联考数学试题(已下线)第二章 立体几何中的计算 专题三 空间体积的计算 微点2 祖暅原理及球体积辅助体综合训练【培优版】(已下线)第六章 突破立体几何创新问题 专题一 交汇中国古代文化 微点2 与中国古代文化遗产有关的立体几何问题(二)【基础版】
9 . 图1是由正方形
组成的一个等腰梯形,其中
,将
、
分别沿
折起使得E与F重合,如图2.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/96241205-5ee2-45fe-a504-beb19971deba.png?resizew=315)
(1)设平面
平面
,证明:
;
(2)若二面角
的余弦值为
,求
长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69f0391c01548b0b5968f5b72cdd203a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5df7626240940eb340420a605e95aeee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c4cd264c97c1f261229925cc5a6761.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/96241205-5ee2-45fe-a504-beb19971deba.png?resizew=315)
(1)设平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca0832e094d5c05ec13c38ae556b3f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c0566d4ccf791d639c7823398941d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56adc934c9ad3cb261c5cbdc346b9631.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/445b51117626fbd3373e32acc514c64b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee14db57f0c762aad845cf5b4a243c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
您最近一年使用:0次
2021-04-16更新
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1065次组卷
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7卷引用:江苏省连云港市、宿迁、扬州市等苏北四市2021届高三下学期4月第二次适应性考试数学试题
解题方法
10 . 如图,已知在三棱锥P﹣ABC中,PA⊥平面ABC,E,F,G分别为AC,PA,PB的中点,且AC=2BE.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/ce51e7d0-0724-4812-9a93-164fba8fca18.png?resizew=260)
(1)求证:PB⊥BC;
(2)设平面EFG与BC交于点H,求证:H为BC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/ce51e7d0-0724-4812-9a93-164fba8fca18.png?resizew=260)
(1)求证:PB⊥BC;
(2)设平面EFG与BC交于点H,求证:H为BC的中点.
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2021-06-12更新
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4卷引用:2020届江苏省百校高三下学期第四次联考数学试题
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