HYACINTHOS 23027

Antreas P. Hatzipolakis

 

Let ABC be a triangle and A'B'C' the orthic triangle.

The perpendicular bisector of the altitude AA' intersects

B'C' at A*.Similarly B*, C*

The circumcircles of A*BC, B*CA, C*AB are concurrent.

Which point is the point of concurrence?

APH