MathDB
Paraguayan National Olympiad 2010, Level 3, Problem 3

Source:

September 20, 2014

Problem Statement

In a triangle ABCABC, let MM be the midpoint of ACAC. If BC=23MCBC = \frac{2}{3} MC and BMC=2ABM\angle{BMC}=2 \angle{ABM}, determine AMAB\frac{AM}{AB}.