解题方法
1 . 如图,正方体
的棱长为2,E为
的中点.
的体积;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b565e518d475a50358fedff2f0bb8dec.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb8c3e6d8e2843a2783a409e130bc0a.png)
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24-25高一上·全国·课后作业
解题方法
2 . 怎样检查你家的门框是否与地面垂直?说出理由.
您最近一年使用:0次
解题方法
3 . 如图,在平行六面体
中,
,
.设
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/4/58b29fe2-0ba5-4e11-afb4-f5e5b6e62003.png?resizew=158)
(1)用基底
表示向量
,
,
;
(2)证明:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7046ea5ec8bb0f777482b086d181e2e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ecd2fb9d59e0d9a46ea3062f566ff40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3adc4ed291596abf3bb93ae7a075d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e984585ddf28c039219afcebf229de7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a5ad65006ab94c402084227f4675b57.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/4/58b29fe2-0ba5-4e11-afb4-f5e5b6e62003.png?resizew=158)
(1)用基底
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c21775d2a1d85b5be06c17f6eeddfd9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4781e3daa2c4e018ca0ae09bb56abc0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bdd77c24f415d52848ff40bc8574b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/333a232d5882b2f03f9e02846c442a95.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d1f6daed7a89d2c7aee5dd8f2d1ac6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd148d264bc9043396f777523e907aa.png)
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解题方法
4 . 已知直线m,n与平面
,
、
,下列命题中正确的是( )
![](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/9f435efcc7869eec21bdba1ed81dc3f5.png)
A.若![]() ![]() ![]() |
B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() |
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2024-03-03更新
|
964次组卷
|
3卷引用:四川省巴中市普通高中2024届高三“一诊”考试理科数学试题
解题方法
5 . 如图,正三棱柱
的各棱长相等,
为
的中点,则异面直线
与
所成角的余弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93ecad355286188fd317939fa50f9555.png)
A.![]() | B.![]() | C.![]() | D.0 |
您最近一年使用:0次
2024-02-28更新
|
346次组卷
|
4卷引用:山西省吕梁市2023-2024学年高二上学期期末数学试题
山西省吕梁市2023-2024学年高二上学期期末数学试题河北省保定市高碑店市崇德实验中学2024届高三下学期3月月考数学试题(已下线)专题13.4空间直线与平面的位置关系--重难点突破及混淆易错规避(苏教版2019必修第二册)(已下线)第六章 立体几何初步(单元测试,新题型)-同步精品课堂(北师大版2019必修第二册)
6 . 如图,四棱锥
中,底面
为正方形,
平面
,点
分别为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/c37383f1-7423-4c39-8b4b-ca5b300aabbe.png?resizew=166)
(1)求证:
;
(2)求平面
与平面
的夹角的余弦值.
![](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/1b55fce0a4716058fe0ad64b01eccc66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b199a99e53d67ff4abf233930961a29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e3a25299c121dbb883fd3c7918d566d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/c37383f1-7423-4c39-8b4b-ca5b300aabbe.png?resizew=166)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc6269077b8e6b063efb583c91a564d.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05479863cf9f41e2ad9f843ea740a3c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
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名校
7 . 已知不重合的直线
和平面
,则下列判断正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b30b3a9e58846c80f3750b4bacd35ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
A.若![]() ![]() | B.若![]() ![]() |
C.若![]() ![]() | D.若![]() ![]() |
您最近一年使用:0次
2024-02-23更新
|
413次组卷
|
5卷引用:福建省福州第三中学2023-2024学年高二上学期1月期末数学试题
福建省福州第三中学2023-2024学年高二上学期1月期末数学试题(已下线)8.6.1直线与平面垂直(已下线)专题13.4空间直线与平面的位置关系--重难点突破及混淆易错规避(苏教版2019必修第二册)广州市南武中学2023-2024学年高一下学期综合训练(二)段考考试数学试题(已下线)核心考点8 立体几何中综合问题 A基础卷 (高一期末考试必考的10大核心考点)
名校
8 . 如图,底面
是边长为2的菱形,
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49477c21c8314be5459819c20e8e6e23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/22/8704f1e5-29cd-4242-9502-ad13cbabfe26.png?resizew=169)
(1)求证:平面
平面
;
(2)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49477c21c8314be5459819c20e8e6e23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f58aee9e9df5e5c25290bef672db74f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/22/8704f1e5-29cd-4242-9502-ad13cbabfe26.png?resizew=169)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e51838e395dfc9d9ef597d9e01f46272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
您最近一年使用:0次
解题方法
9 . 已知点
是平行四边形
所在平面外一点,如果
,
,
,下列结论正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ce9089022a8fdc4cd455b311a16f94a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb0119751f0aee7c7f22576d8e359c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c02c104e1eb6c9d1f65759da7667a1a.png)
A.![]() | B.![]() ![]() |
C.![]() ![]() | D.四边形![]() |
您最近一年使用:0次
名校
解题方法
10 . 刍薨是《九章算术》中出现的一种几何体,如图所示,其底面
为矩形,顶棱
和底面平行,书中描述了刍薨的体积计算方法:求积术曰,倍下袤,上袤从之,以广乘之,又以高乘之,六而一,即
(其中
是刍薨的高,即顶棱
到底面
的距离),已知
和
均为等边三角形,若二面角
和
的大小均为
,则该刍薨的体积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/18/e2573e39-f88a-446d-8934-e546060d4b34.png?resizew=185)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41461783442dd13f5cbc57d04599f215.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ec0665622eb3f5db80457d2eb8319cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe51b50eca45db5d8ca5f4949c56d137.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c911b404bbb8f8d5f1470585fa31ad97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b01ad3fe1fcfd32718b835249326d2e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/18/e2573e39-f88a-446d-8934-e546060d4b34.png?resizew=185)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次