三棱锥
中,
两两垂直,
,
,则点
到平面
的距离为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8759e236bed05ad831f89f66070a477.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dc53b48b66d338cc4976c2c01c14bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/106997abd337c8d3239139d9f0b14cff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2022-11-02 20:13:43
|
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单选题
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适中
(0.65)
名校
解题方法
【推荐1】如图,在矩形
中,
为
边上的点,且
,将
沿
所在直线翻折到
的位置,使
,则四棱锥
的体积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/665230954c841a8869f42105d5caefb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/765922855c551e266992f66b762a86f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4ab88b5a64821a06de8593ddba0145.png)
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A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
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解题方法
【推荐2】长方体
中,
,
,上底面
的中心为
,当点
在线段
上从
移动到
时,点
在平面
上的射影
的轨迹长度为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb4957406b21df59fdf7fa184752287b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1b90bf8b51db7a4ff6e0678bd3d1ea0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d609847e2ff3d64e5a514582c3ead0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ecac2dad4cffdd971fd23deacff3fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
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A.![]() | B.![]() | C.![]() | D. ![]() |
您最近一年使用:0次
单选题
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适中
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解题方法
【推荐3】如图,在棱长为1的正方体
中,点P是线段
上的动点,下列说法错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/21/73f46ad0-c615-48fc-95cb-04222e6f4fac.png?resizew=162)
A.![]() ![]() |
B.![]() |
C.异面直线AP与![]() ![]() |
D.三棱锥![]() |
您最近一年使用:0次
单选题
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适中
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解题方法
【推荐1】在
中,
,
,
,
为
的中点,将
沿
折起,使
,
间的距离为
,则点
到平面
的距离为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/4/4ea11623-73a2-44a8-90a2-ca3850fbfa02.png?resizew=193)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dddb32a7a5c157fdf8aa049b2d665b4c.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
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您最近一年使用:0次
单选题
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适中
(0.65)
【推荐2】如图,在长方体
中,
,
为
中点,则点
到平面
的距离为
![](https://img.xkw.com/dksih/QBM/2018/1/2/1851643394908160/1852475597021184/STEM/3a2580a764e343d0a96cb3eeebbb6b84.png?resizew=112)
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A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐3】已知正方形
的边长为4,对角线
与
交于点
,将正方形
沿对角线
折成60°的二面角,
到
点.给出下列判断:①
;②
;③
为正三角形;④
;⑤
到平面
的距离为
.其中正确判断的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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