Rette per l'ortocentro: riflessione sui lati
- Author:
- Lamberto Lamberti
Reflect a line passing through the orthocenter H of ΔABC in the three sidelines. The three reflections concur on the circumcircle of the triangle.
http://www.cut-the-knot.org/Curriculum/Geometry/OrthoReflections.shtml
