four lines on a triangle@@

@There is a triangle. A pink line is the bisector of angle. A yellow line is the perpendicular. A blue line is the median. A green line is perpendicular at midpoint. Move point P to find when the four lines became one line. E-mail me @You can also move points (A,B,C) on CABRI. Download CABRI‡U data (d60) from here.