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Named after Joseph Diaz Gergonne.
Etymology from Wiktionary, CC BY-SA 4.0.
Gergonne point
Today it means: A certain triangle center. Given a triangle ∆ABC and its Gergonne triangle (with the touchpoint opposite A denoted by T_A, etc.), the Gergonne point is the intersection of the three lines AT_A, BT_B, and CT_C. Full definition →