A simple proof of Feuerbach's theorem
History and Overview
2016-10-14 v1
Abstract
The theorem of Feuerbach states that the nine-point circle of a nonequilateral triangle is tangent to both its incircle and its three excircles. We give a simple proof of this theorem.
Cite
@article{arxiv.1610.03962,
title = {A simple proof of Feuerbach's theorem},
author = {Franz Hofbauer},
journal= {arXiv preprint arXiv:1610.03962},
year = {2016}
}