if posssible, could you only give me a few theorems in order to assist me in this question. Thankyou in advance! Links to simple websites would also be appreciated.
In triangle $ABC$ $F$ is midpoint of $AC$ $E$ is midpoint of $AB$
$X$ and $Y$ are points along $CB$
If $EX$ and $FY$ are parallel and $EFYX$ is a parallelogram, what is the ratio of the area of $EFYX$ to $ABC$?
All I understand is that similarity or congruency should somehow be used.