Newton-Gauss line

Let $AECF$ be a complete quadrilateral, and $AC$, $BD$, $EF$ his diagonals. Let $P$ be the middle of $AC$, $Q$ the middle of $BD$, and $R$ the middle of $EF$. Then $P,Q,R$ are on a same line, called the Newton-Gauss line.

Title	Newton-Gauss line
Canonical name	NewtonGaussLine
Date of creation	2013-03-22 14:05:47
Last modified on	2013-03-22 14:05:47
Owner	vmoraru (1243)
Last modified by	vmoraru (1243)
Numerical id	4
Author	vmoraru (1243)
Entry type	Definition
Classification	msc 51-00