雷米欧司1840年写信给斯坦纳时提出了这个问题,下面这种证明是1842年就出现的,速度惊人啊,对于这样一个难题来说. A proof using SSA:F.G.Hesse (1842) C / / F___________E_____D / / / G / / / / / / A/_______________B We consider given that ABC is a triangle, AD and BE bisect angles A and B such that AD=BE. Construct F such that AF=AE and DF=AB. Let G be the intersection of AD and BE. We find ADF and EBA are congruent,so