Y by
Let
be a circumscribed quadrilateral and let
be the intersection point of its diagonals
and
. Let
be the incenters of
,
,
, and
, respectively. The circumcircle of
intersects the sides
and
at points
and
, respectively. The circumcircle of
intersects the sides
and
at points
and
, respectively. Prove that 




















This post has been edited 1 time. Last edited by a_507_bc, May 3, 2024, 10:16 AM