Griffiths Points
``The'' Griffiths point is the fixed point in Griffiths' Theorem. Given four points on a Circle and a linethrough the center of the Circle, the four corresponding Griffiths points are Collinear (Tabov 1995).
The points
are known as the first and second Griffiths points, where
is the Incenter and Ge is the GergonnePoint.See also Gergonne Point, Griffiths' Theorem, Incenter, Oldknow Points, Rigby Points
References
Oldknow, A. ``The Euler-Gergonne-Soddy Triangle of a Triangle.'' Amer. Math. Monthly 103, 319-329, 1996. Tabov, J. ``Four Collinear Griffiths Points.'' Math. Mag. 68, 61-64, 1995.
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