File:Triangle.NinePointCircle.svg · Wikimedia Commons · See Wikimedia Commons
nine-point circle
Sign in to saveAlso known as Feuerbach’s circle, Euler's circle
circle passing through nine significant concyclic points defined from the triangle
~12 min read
Encyclopedic overview
The nine points
In geometry, the nine-point circle is a circle that can be constructed for any given triangle. It is so named because it passes through nine significant concyclic points defined from the triangle. These nine points are:
Excerpted from Wikipedia’s “nine-point circle” article, available under the CC BY-SA 4.0 licence.