Y by
Let
be an acute triangle, with
. Let
and
be the tangency points between the incircle of triangle and sides
, respectively. Let
be a point on
,
a point on
,
a point on
and
a point on
, such that
Let
be the intersection point between
and
and let
be the intersection point between
and
. Prove that
is cyclic.





















This post has been edited 2 times. Last edited by parmenides51, Jul 18, 2024, 1:49 AM