如图,已知直线a与坐标轴分别交于A、B两点,其中点B的坐标为(3,0),线段AB的垂直平分线b交y轴于点C(0,1),则AC的长为__ .
![](https://img.xkw.com/dksih/QBM/2014/11/28/1573761735819264/1573761742307328/STEM/5e580f956d0e40bb95a7fdd7d02039b9.png?resizew=159)
更新时间:2016-12-05 13:29:22
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【知识点】 两直线的交点与二元一次方程组的解解读
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【推荐2】对于平
面直角坐标系中任意两点
、
,称
为
、
两点的直角距离,记作:
.
是一定点,
是直线
上的一动点,称
的最小值为
到直线
的直角距离.若
到直线
的直角距离为6,则a=___________ .
![](https://img.xkw.com/dksih/QBM/2017/8/17/1754072769118208/1758023432216576/STEM/ee9951fd729c408bb244f8f3966d012a.png?resizew=3)
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