Nikolai Ivanov Beluhov, Ten concurrent Euler lines,
Forum Geometricorum, 9 ( 2009) 271--274.
Abstract: Let F_1 and F_2 denote the Fermat-Toricelli points of a given triangle
ABC. We prove that the Euler lines of the 10 triangles with vertices chosen
from A, B, C, F_1, F_2 (three at a time) are concurrent at the centroid of