名校
1 . 在四面体
中,已知
,且
两两相互垂直,在该四面体表面上与点
距离为
的点形成一条曲线,则这条曲线的长度是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/122d2a4783df65bdce9b5e15e3c41312.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9db734b3cc20d0f220d6721b73ee8f40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18483c9c195ecd922772527fa85c0fcb.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-02-28更新
|
208次组卷
|
2卷引用:陕西省西安市铁一中2016-2017学年高一下学期期中数学试题
2 . 已知正方体
的棱长为
,动点
在正方体表面上且满足
,则动点
的轨迹长度为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc168963a7ee259a2c2bf112f05e7718.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次