Y by
Point
is selected inside triangle
. It turned out that circles
and
inscribed in triangles
and
respectively, touch each other. Denote by
the intersection point of common external tangents to
and
. Prove that
lies on the line
.
S. Berlov











S. Berlov
This post has been edited 1 time. Last edited by parmenides51, Jul 3, 2021, 8:01 AM