Problem A. 639. (March 2015)

A. 639. The angle trisectors of a triangle bound a convex hexagon in the interior of the triangle. Prove that the diagonals of this hexagon, that connect opposite vertices, are concurrent.

Proposed by: Zoltán Bertalan, Békéscsaba

(5 pont)

Deadline expired on April 10, 2015.

Statistics:

9 students sent a solution.
5 points:	Adnan Ali, Csépai András, Fehér Zsombor, Glasznova Maja, Janzer Barnabás, Porupsánszki István, Schrettner Bálint, Wei Cong Wu, Williams Kada.

Problems in Mathematics of KöMaL, March 2015