Y by
In trapezoid
, the bisector of angle
intersects the base
at point
. Point
is the midpoint of side
. A straight line parallel to
and passing through
intersects side
at point
. It turned out that the angle
is a straight line. Find the ratio
.












This post has been edited 1 time. Last edited by parmenides51, Feb 14, 2021, 10:49 AM