Feuerbach's Theorem/Historical Note

From ProofWiki
Jump to navigation Jump to search

Historical Note on Feuerbach's Theorem

Feuerbach's Theorem was proved in $1822$ by Karl Wilhelm Feuerbach.

This was two years after Jean-Victor Poncelet and Charles Julien Brianchon had demonstrated the existence of the nine point circle, now known as the Feuerbach circle.