Y by FreakLM10, MatBoy-123, Adventure10, Rounak_iitr
Let
be an acute-angled triangle with
. Let
be the incentre of triangle
, and let
be the points where the incircle touches the sides
respectively. Let
meet the line
at
respectively. Further assume that both
and
are outside the triangle
. Prove that
are concyclic.
is also the incentre of triangle
.
















