Gergonne point

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The point of intersection of the lines joining the vertices of a triangle to the points where the sides of the triangle opposite to the vertices touch the inscribed circle. Named after G. Gergonne (19th century).

Figure: g044380a

How to Cite This Entry:
Gergonne point. A.B. Ivanov (originator), Encyclopedia of Mathematics. URL:
This text originally appeared in Encyclopedia of Mathematics - ISBN 1402006098