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[几何] 以完全四线形的对角线为直径的圆所在的圆组

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hbghlyj Posted 2023-5-28 05:07 |Read mode
Footnote
...as can be seen in Alexander Bogomolny's animation of the same results, the pencil can be hyperbolic instead of elliptic, in which case the circles do not intersect.
给定3条直线,如何作出第4条直线,使得以完全四线形的对角线为直径的3个圆相切

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图的代码是啥软件转的?竟然保留小数点后15位😳  Posted 2023-5-28 15:27
是ggb啊  Posted 2023-5-28 17:31

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 Author| hbghlyj Posted 2023-5-28 07:08
完全四边形有4线6点,每个点是两条直线的交;完全四面体中有4面6线,每条直线是两个面的交。
“完全四线形的对角线为直径的三圆同轴”在空间上有类比吗?

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