已知正六边形ABCDEF的边长为2,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d6ec333dc50e1be06940bda2f497858.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d6ec333dc50e1be06940bda2f497858.png)
更新时间:2023-02-09 15:33:40
|
【知识点】 用定义求向量的数量积解读
相似题推荐
填空题-单空题
|
较易
(0.85)
【推荐1】已知O为
所在平面内一点,且满足
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/665c5ee9d7481d57d731cfe40f3894a9.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/242b14a89363fa1e1a3b74ed989a5311.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/665c5ee9d7481d57d731cfe40f3894a9.png)
您最近一年使用:0次
填空题-单空题
|
较易
(0.85)
解题方法
【推荐2】在
中,
为其外心,
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9587a1b9e0ebce227e94f735a8f19570.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e19661445a604b4abffb77a40513cb10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9587a1b9e0ebce227e94f735a8f19570.png)
您最近一年使用:0次