Antreas Hatzipolakis

Let ABC be a triangle and (Oa), (Ob), (Oc) the circles with diameters BC, CA, AB, resp.

Questions:

1. Which are the centers of the circles touching externally/internally (Oa), (Ob), (Oc) ?

**** X(7090) and X(14121).

2. Is the triangle ABC perspective with the triangles of touchpoints ?

Angel Montesdeoca Sep. 2017