Y by Adventure10, Mango247
Let
be the midpoints of
repectively on a given triangle
. Let
be a circle passing through
and tangent to the circumcircle of
, say at
. Suppose that
and
meet at
. Show that
is perpendicular to
.












This post has been edited 1 time. Last edited by parmenides51, Sep 9, 2019, 4:53 PM