r421

Let X+, Y+, Z+ the centers of the Fermat external triangles,  X-, Y-, Z- the same of the internal ones. The circles {AY+Z+}, {BZ+X+}, {CX+Y+} and the circles {AY-Z-}, {BZ-X-}, {CX-Y-} intersect at the point X(110).


inici
  resultats