Y by Davi-8191, A-Thought-Of-God, HamstPan38825, Hasin_Ahmad, Adventure10, Mango247
Let
be an acute triangle and let
be the foot of the
-bisector. Moreover, let
be the midpoint of
. The circle
with diameter
meets
at
, while the circle
with diameter
meets
at
. Assume that
and
lie inside
. Prove that
,
,
,
are concyclic.



















