Bruno J., what's in it? though it is indeed a remarkable line . . . . are you expressing amazement without bothering us to solve what? Excuse me . . . . .
An extremely surprising theorem. It's truly miraculous that so many apparently unrelated points are always collinear.
Euler line - Wikipedia, the free encyclopedia
Euler line - Math Open Reference
Many thanks for the reference.
That is a big assist in answering this thread:
http://www.mathhelpforum.com/math-he...-geometry.html