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四点共线是什么意思
更新时间: 2021-02-28 22:32:01  

1、通俗点来说就是4个点在一条直线上 数学的角度上来说就是,每2个点之间的夹角都是180°。

2、先证明三点共线,证明:设有A,B,C,D四点、首先证明A,B,C三点共线,即证明AB//BC 平行即可。因为B为两线的共用点,两线又平行,当然A,B,C三点共线。同理可证四点共线。

关键词: 四点 什么 意思

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