已知棱长为2的正方体
中,
,
,
分别是
的中点,则直线
与平面
之间的距离为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/240e313f52240ce65584e4003f3d2ab3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/868a98a5d6337c3dd9bca228e3545665.png)
A.1 | B.![]() | C.![]() | D.![]() |
更新时间:2024-05-12 13:49:06
|
相似题推荐
单选题
|
适中
(0.65)
【推荐1】在正方体
中,点
,
,
分别为棱
,
,
的中点,给出下列命题:①
;②
;③
平面
;④
和
成角为
.正确命题的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e3334853138fb74687d66b1e45f2fd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/670f3eaaa637bc72658cf2d8cffdd1bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f6413cff7a41c3da3c3ee9c21eafced.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93f94bf6140206c527ca23425ede214d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86188a4a37f2cd06097616e6db53288c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐2】如图,在正方体
中,点
是线段
(含端点)上的动点,则下列结论错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/97701dae-b06c-49dd-a14b-226358ecc41a.png?resizew=173)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e539f26ed5e0b20ff7220559324869a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/97701dae-b06c-49dd-a14b-226358ecc41a.png?resizew=173)
A.存在点![]() ![]() |
B.异面直线![]() ![]() ![]() |
C.无论点![]() ![]() ![]() |
D.无论点![]() ![]() ![]() ![]() |
您最近一年使用:0次
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【推荐3】如图所示的八面体的表面是由2个全等的等边三角形和6个全等的等腰梯形组成,设
,
,有以下四个结论:
①
平面
; ②
平面
;
③直线
与
成角的余弦值为
④直线
与平面
所成角的正弦值为
.
其中正确结论的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/28/34f390e6-ecea-44bc-8ad5-62f5deb3aaf8.png?resizew=195)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1bdb08d371f24f7b4aeae53f292050.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c50346190b81576e0d891456af44490.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d4680b5fd79c9734c4439e28cdf3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7312cd653ef43a6ab81dd5da81cac779.png)
③直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c8b7a498f2fa0820ad123a8756ce64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c6c7567972273b4ba733b47bf9d5408.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fd6a02542c1ee2d2a60ea0a9ce7e82d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
其中正确结论的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/28/34f390e6-ecea-44bc-8ad5-62f5deb3aaf8.png?resizew=195)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
【推荐1】正方体
的棱长为2,
分别为
的中点,
为底面
的中心,则三棱锥
的体积是( )
![](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/26e916f630da757af38afa6db6cd2a5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3487917a3a52c39b7251a8402869249a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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适中
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解题方法
【推荐2】在棱长为1的正方体
中,E为
的中点,则点
到平面
的距离为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a98287a302228ece1fa53c5c66c590f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次