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[几何] 哪些四边形存在外接抛物线

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hbghlyj posted 2024-11-4 16:36 |Read mode

对于平面上的四个不同点 A、B、C、D，存在一条通过这四个点的非退化抛物线当且仅当这四个点形成一个非平行四边形的非退化凸四边形

外接抛物线

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• 圆内接四边形的质心在外接抛物线的主轴上

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original poster hbghlyj posted 2024-12-29 12:22

web.archive.org/web/0/http://www2.washjeff.ed … ermann/Dorrie/45.pdf
mathpages.com/home/kmath037/kmath037.htm
mathpages.com/home/kmath546/kmath546.htm

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