It is said that the recent failure of the IMO team

(Figure built on Microsoft Paintbrush Technology)

Plane geometry can be a rare maggot. This problem is difficult to multi-round, highly asymmetric and has some complexity. , the abc,h is the vertical heart, O is perpendicular, M is the midpoint. QK on the ABC circumscribed circle, all the small triangles on the graph form right angle. It is now necessary to prove that the triangular qhk circumscribed circle and the circumscribed circle tangent of Mok.

If the analysis, estimates also do the coordinates, to the coordinates of the Q may need to solve the two-yuan two-time equation, K more do not know. Then, no then.

It is said that the recent failure of the IMO team