解题方法
1 . 已知正方体
的棱长为2,其外接球球心为
,点
分别是棱
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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/362ef25f87ac1de47027b7d7c150a56c.png)
A.球![]() ![]() ![]() ![]() |
B.球![]() ![]() ![]() ![]() ![]() |
C.直线![]() ![]() ![]() |
D.三棱锥![]() ![]() |
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2 . 下列命题正确的是__________ .(填序号)
①若一条直线平行于两个相交平面,则这条直线与这两个平面的交线平行;
②垂直于同一条直线的两直线平行;
③两个平面互相垂直,过一个平面内任意一点作交线的垂线,必垂直与另一个平面;
④过两个点与已知平面的垂直的平面可能不存在;
⑤过两条异面直线外任一点有且只有一条直线与这两条异面直线都垂直;
⑥到一个四面体的四个顶点的距离都相等的平面有7个.
①若一条直线平行于两个相交平面,则这条直线与这两个平面的交线平行;
②垂直于同一条直线的两直线平行;
③两个平面互相垂直,过一个平面内任意一点作交线的垂线,必垂直与另一个平面;
④过两个点与已知平面的垂直的平面可能不存在;
⑤过两条异面直线外任一点有且只有一条直线与这两条异面直线都垂直;
⑥到一个四面体的四个顶点的距离都相等的平面有7个.
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解题方法
3 . 已知正方体
,
分别是边
上(含端点)的点,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1405380585b52d7fc8640f179cceec9.png)
A.当![]() ![]() |
B.当![]() ![]() |
C.当![]() ![]() ![]() |
D.当平面![]() ![]() ![]() |
您最近一年使用:0次
2023高三·全国·专题练习
解题方法
4 . 利用定义法、向量法证明直线与平面垂直的判定定理:如果一条直线与一个平面内的两条相交直线都垂直,那么这条直线垂直于这个平面.
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5 . 如图,平面四边形ABCD中,
是等边三角形,
且
,M是AD的中点.沿BD将
翻折,折成三棱锥
,翻折过程中下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/a2027a22-b0ca-4183-b96c-5a233b68bac0.png?resizew=358)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8915e8e775538d41debf1933102c6b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a05e0ab55e325fb3b85fc8ca9c27c76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3931333820859378ea6723ff3075189.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/a2027a22-b0ca-4183-b96c-5a233b68bac0.png?resizew=358)
A.当平面![]() ![]() ![]() |
B.棱CD上存在一点N,使得![]() |
C.存在某个位置,使得CM与BD所成角为锐角 |
D.三棱锥![]() ![]() ![]() |
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6 . 已知正四棱锥
的所有棱长均为
,E,F分别是PC,AB的中点,M为棱PB上异于P,B的一动点,则以下结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
A.直线![]() |
B.异面直线EF、PD所成角的大小为![]() |
C.直线EF与平面ABCD所成角的正弦值为![]() |
D.存在点M使得![]() |
您最近一年使用:0次
2023-08-09更新
|
420次组卷
|
3卷引用:广东省云浮市黄岗实验中学2022-2023学年高一下学期5月月考数学试题
解题方法
7 . 在正方体
中,
为棱
的中点,
在侧面
上运动,且
,已知正方体的棱长为2,则( )
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a58ae9d6050e62173f72f1b7fcb39f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/16/6fb86561-1997-453c-b12b-4c40c6adc961.png?resizew=157)
A.![]() ![]() ![]() |
B.![]() ![]() |
C.![]() ![]() |
D.当![]() ![]() ![]() ![]() |
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8 . 如图,已知圆柱母线长为
,底面圆半径为
,梯形
内接于下底面,
是直径,
//
,
,点
在上底面的射影分别为
,
,
,
,点
分别是线段
,
上的动点,点Q为上底面圆内(含边界)任意一点,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c82a10b4f0c9323d726804c89dd9548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/31/98aa4952-9475-4ca2-9c91-f97436f7b943.png?resizew=166)
A.若面![]() ![]() ![]() ![]() ![]() |
B.若面![]() ![]() ![]() |
C.![]() |
D.当点Q在上底面圆周上运动时,记直线![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
2023-05-29更新
|
796次组卷
|
3卷引用:山东省淄博市2023届高三三模数学试题
解题方法
9 . 如图,在棱长为2的正方体
中,点
满足
,
,其中
,在下列说法中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/23/23ce23a8-7ab4-4db3-8cd2-efc5abbcf118.png?resizew=181)
①存在
,使得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6d43d720bda8eecbab00e2f3db19803.png)
②存在
,使得
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b36a70bc52a720ba8750aee4924307.png)
③当
时,
取最小值
④当
时,存在
,使得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb943b2fe2f7a3069669108950c3e889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3d942e96f32f628447ab5f8fec0e24d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4514f4b4d139023fc10b91b02ca07b4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf89344ded4d4ebb94edf2b8d42ed8dc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/23/23ce23a8-7ab4-4db3-8cd2-efc5abbcf118.png?resizew=181)
①存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf89344ded4d4ebb94edf2b8d42ed8dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6d43d720bda8eecbab00e2f3db19803.png)
②存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf89344ded4d4ebb94edf2b8d42ed8dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93cf663ee2bf1ac5c43f4306fa0cf250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b36a70bc52a720ba8750aee4924307.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a3e3a793d8df4deb46f456cda72b4c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
④当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76819195cffab10d81638dd673f3af98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eb6bf23a5a12e1ba5413594d7b1a57c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb943b2fe2f7a3069669108950c3e889.png)
A.①② | B.②③ | C.③④ | D.②④ |
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解题方法
10 . 如图,在棱长为
的正方体
中,点
满足
,其中
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb45519607ebef21cde7685a2015ffe4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf89344ded4d4ebb94edf2b8d42ed8dc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/29/d66ccf35-b922-4636-9970-bdafadf54b4d.png?resizew=167)
A.存在![]() ![]() |
B.存在![]() ![]() ![]() |
C.当![]() ![]() |
D.当![]() ![]() ![]() |
您最近一年使用:0次
2023-04-21更新
|
1221次组卷
|
3卷引用:河北省石家庄市部分学校2023届高三联考(二)数学试题