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怎样判断两条直线互相垂直
更新时间: 2020-07-06 00:00:00  

与给定直线或平面成直角的或以直角放置的 ,这两条直线互相垂直 。与水平面成直角的 :

1、在同一平面内,过一点有且只有一条直线与已知直线垂直;

2、连接直线外一点与直线上各点的所有线段中,垂线段最短,简单说成:垂线段最短;

3、点到直线的距离:直线外一点到这条直线的垂线段的长度,叫做点到直线的距离。

关键词: 怎样 判断 直线 互相 垂直

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