Brianchon's theorem


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Brianchon's theorem

[¦brē·ən¦känz ‚thir·əm]
(mathematics)
The theorem that if a hexagon circumscribes a conic section, the three lines joining three pairs of opposite vertices are concurrent (or are parallel).
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.