Nine point circle

Revision as of 11:47, 6 July 2007 by JBL (talk | contribs)

The nine point circle (also known as Euler's circle or Feuerbach's circle) of a given triangle is a circle which passes through 9 "significant" points:

That such a circle exists is a non-trivial theorem of Euclidean geometry.

The center of the nine point circle is the nine-point center and is usually denoted $N$.

This article is a stub. Help us out by expanding it.

Invalid username
Login to AoPS