Y by
Let
be a quadrilateral with parallel sides
and
,
and
are the midpoints of its sides
and
, respectively. The straight line
bisects the segment connecting the centers of the circumcircles of triangles
and
. Prove that
is a parallelogram.











This post has been edited 1 time. Last edited by parmenides51, Sep 27, 2024, 4:12 PM