HYACINTHOS 27519

[APH]:

Let ABC be a triangle and A'B'C' the pedal triangle of O.

Denote:

A1, B1, C1 = the orthogonal projections of A, B, C on OA', OB', OC', resp.

A2, B2, C2 = the orthogonal projections of O on AA', BB', CC', resp

 

The circumcircles of A'A1A2, B'B1B2, C'C1C2 are coaxial.

 

Radical trace?

 

 

[Peter Moses]:


Hi Antreas,

X(625)

Best regards,
Peter.