| 单词 | Confocal Conics |
| 释义 | Confocal ConicsConfocal conics are Conic Sections sharing a common Focus. Any two confocal CentralConics are orthogonal (Ogilvy 1990, p. 77). See also Conic Section, Focus
Ogilvy, C. S. Excursions in Geometry. New York: Dover, pp. 77-78, 1990. |
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