411 REFERENCE · Wiktionary
Feuerbach point
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
thumb|300px|The nine-point circle is tangent to the incircle and excircles of a triangle. The incircle tangency is the Feuerbach point.
Etymology
Named after Karl Wilhelm Feuerbach.
Noun
en geometry A kind of triangle center, defined as the point at which the incircle and nine-point circle of the triangle are internally tangent to each other.
Related terms
en Feuerbach's theorem
en Feuerbach triangle
en eponyms