Y by Miku_, ImSh95, Adventure10, Mango247, ItsBesi, DEKT, and 1 other user
Let
be an acute-angled triangle with
and let
be the centre of its circumcircle
. Let
be a point on the line segment
such that
. Let
be the second point of intersection of
and the line
. If
,
and
are the midpoints of the line segments
,
and
, respectively, show that the points
,
and
are collinear.



















This post has been edited 1 time. Last edited by Igor, Jun 24, 2013, 12:17 AM