ADGEOM 1511

Dear friends

 

If A', B', C' are the incenters of triangles IBC, ICA, IAB

I = Incenter of ABC

then I think that the triangles ABC, A'B'C' are perspective

at P = (1/(cotA-cot(A/4)) : . .  :  . . ) 

with search 6_9_13 number 44.3018615934

and this point is not in ETC.

Am I right?

 

Best regards

Nikos Dergiades