Definición de circumcircle en inglés:
A circle touching all the vertices of a triangle or polygon.
- The three lines through the incircle and the circumcircle of the three triangles meet at a point.
- The circumcircle of a triangle formed by three tangents to a parabola passes through the focus of the parabola.
- Prove that the circumcircles of the triangles BMR and CNR have a common point lying on the side BC.