Gergonne triangleGergonneTriangle2002-01-08 01:21:372002-05-17 03:12:57Definition\usepackage{graphicx}
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\newcommand{\figuraex}[2]{\begin{center}\includegraphics[#2]{#1}\end{center}}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 \emph{Gergonne triangle} or \emph{contact triangle} of $ABC$.\psfrag{A}{$A$}\psfrag{B}{$B$}\psfrag{C}{$C$}\psfrag{D}{$D$}\psfrag{E}{$E$}\psfrag{F}{$F$}\psfrag{P}{$P$}
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