| 单词 | brianchon's hexagram |
| 释义 | > as lemmasBrianchon's hexagram The term is spec. applied to: (a) Pascal's mystic hexagram, which is formed by lines joining six points on a conic, and has the property that the intersections of the first and fourth, the second and fifth, and the third and sixth of these lines lie on one straight line; (b) Brianchon's hexagram, which is a six-sided figure circumscribed about a conic, and has the property that the three lines joining opposite angles intersect in one point.extracted from hexagramn.< as lemmas |
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