Gergonne triangle

Let $ABC$ be a triangle and $D,E,F$ where the incircle touches the sides $BC,CA,AB$ respectively. Then triangle $DEF$ is called the Gergonne triangle or contact triangle of $ABC$.

Title	Gergonne triangle
Canonical name	GergonneTriangle
Date of creation	2013-03-22 12:11:14
Last modified on	2013-03-22 12:11:14
Owner	drini (3)
Last modified by	drini (3)
Numerical id	6
Author	drini (3)
Entry type	Definition
Classification	msc 51-00
Synonym	contact triangle
Related topic	Triangle
Related topic	GergonnePoint
Related topic	Incircle
Related topic	Incenter
Related topic	Centroid
Related topic	Grafix