名校
解题方法
1 . 如图,已知平行六面体ABCD—A1B1C1D1的底面ABCD是菱形,且∠C1CB=∠C1CD=∠BCD=60°
![](https://img.xkw.com/dksih/QBM/2021/11/19/2854698838319104/2857372135292928/STEM/09d07ed6f6e14b4bb5acfa9c863110f0.png?resizew=194)
(1)证明:C1C⊥BD;
(2)当
的值为多少时,能使A1C⊥平面C1BD?请给出证明.
![](https://img.xkw.com/dksih/QBM/2021/11/19/2854698838319104/2857372135292928/STEM/09d07ed6f6e14b4bb5acfa9c863110f0.png?resizew=194)
(1)证明:C1C⊥BD;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56149ce7d8ec1225d2efedc06b8a3b2.png)
您最近一年使用:0次
名校
2 . 在正三棱台
中,
是边长为
的等边三角形,且
.已知
,
,
,
分别是线段
,
的中点,当直线
上一动点
在射线
上时,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/45fdfe37-a174-4faf-9513-6a3beda731bf.png?resizew=247)
(1)证明:
平面
;
(2)求直线
与平面
所成角的正弦值;
(3)连接
,
,已知点
在平面
投影是
,平面
是一个分别以
,
作为
,
轴的复平面,
.当
时,请直接写出
的虚部(不要求写出过程).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c6e8a07dcdeec1d196fd31a616d25d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed78b13131d8ce1c65091b6b259a1082.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73d84cdf3d579140b8e5b6f9f4efcc23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efac9930e80e002a537bc0a6da526866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192f4f9446c954a291f779d963f90257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48c79f3aa20d5255d03a498afafbf727.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfc386b9493102a587025523dc69ccba.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/45fdfe37-a174-4faf-9513-6a3beda731bf.png?resizew=247)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f6d39135a2f8472d66ea00eda3b13ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b94e97d085cea077cb82a0b7d2f523e.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/904cb7508ea31d4d1e3b39b594decfad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45224f7eac9d0cef64bf28d93e7721a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
您最近一年使用:0次
2021-11-22更新
|
512次组卷
|
4卷引用:8.6空间直线、平面的垂直C卷
3 . 如图,正方体
中,点
在线段
上运动,则下列结论中不正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/3aca9b03-cc89-48c0-ac0f-672bf04c3483.png?resizew=177)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/3aca9b03-cc89-48c0-ac0f-672bf04c3483.png?resizew=177)
A.直线![]() ![]() |
B.直线![]() ![]() |
C.三棱锥![]() |
D.异面直线![]() ![]() ![]() |
您最近一年使用:0次
2021-11-21更新
|
659次组卷
|
4卷引用:8.6空间直线、平面的垂直A卷
(已下线)8.6空间直线、平面的垂直A卷四川省成都市郫都区2021-2022学年高二上学期期中考试数学(理)试题四川省成都市郫都区2021-2022学年高二上学期期中考试数学(文)试题(已下线)专题07 立体几何中的范围与最值问题-2021-2022学年高一数学下学期期末必考题型归纳及过关测试(人教A版2019)
4 . 如图,在几何体ABCDEF中,四边形ABCD是边长为3的正方形,
,平面
平面ABCD,
中BC边上的高
,
.求该几何体的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/058f36d315245b63a811d5c6f348c17b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d740c5dcc2122cb8767b512abb429f48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6a0c85deb80d8e63bc60127e803f7ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cd2d45694aaded7ff8b0ecaf48196ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db37b5ce697dab3189a15881d00fcd0e.png)
您最近一年使用:0次
2021-11-13更新
|
227次组卷
|
5卷引用:第十三章本章回顾
(已下线)第十三章本章回顾(已下线)习题 6-62016-2017学年陕西省西安中学高一(平行班)上学期期末考试数学试卷苏教版(2019)必修第二册课本习题第13章复习题北师大版(2019)必修第二册课本习题 习题6-6
20-21高一·全国·课后作业
解题方法
5 . 在棱长均为a的正三棱锥
中.
(1)求证:
;
(2)求三棱锥
的表面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e7c18f9db65fcd840b39d7bbd3028c.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
您最近一年使用:0次
20-21高一·全国·课后作业
解题方法
6 . 在正方体
中,求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6034ec04b02afdf9c82fab980223794.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae7f4612c548b1f72a964ddb291cd2e.png)
您最近一年使用:0次
20-21高一·全国·课后作业
解题方法
7 . 证明:如果平面内的一条直线与这个平面的一条斜线垂直,那么这条直线就和这条斜线在这个平面内的射影垂直.
您最近一年使用:0次
2021-11-13更新
|
429次组卷
|
6卷引用:13.2.3 直线与平面的位置关系
(已下线)13.2.3 直线与平面的位置关系(已下线)第12课时 课后 直线与平面垂直的判定(已下线)6.3空间向量的应用苏教版(2019) 选修第二册 名师导学 第六章 6.3.2 空间线面关系的判定苏教版(2019)必修第二册课本习题 习题13.2(3)苏教版(2019)选择性必修第二册课本习题6.3 空间向量的应用
20-21高一·全国·课后作业
8 . 如图,在四棱锥
中,底面ABCD是矩形,
平面ABCD.
(2)若
,试求PC与平面ABCD所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc4c58d7bdd6ecebf94c0d6add63ba6.png)
您最近一年使用:0次
20-21高一·全国·课后作业
解题方法
9 . 如图,在四棱锥
中,底面ABCD是菱形,且
,判断直线AC与平面PBD是否垂直,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb96e0331eebe80ed1ff610faf531fe.png)
您最近一年使用:0次
20-21高一·全国·课后作业
10 . 如图,在正方体
中:
与平面ABCD所成的角;
(2)求直线
与平面
所成的角;
(3)直线
在平面ABCD内的射影是哪条直线?
(4)直线
在平面
内的射影是哪条直线?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
(3)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
(4)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
您最近一年使用:0次