# Feuerbach's theorem

> the theorem that the nine-point circle of any triangle is tangent to the incircle and to the three excircles

**Wikidata**: [Q3527074](https://www.wikidata.org/wiki/Q3527074)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Feuerbach's_theorem)  
**Source**: https://4ort.xyz/entity/feuerbach-s-theorem