Point AC is parallel to Point DB at point O. DB and AC bisect each other.
Triangle AOD IS CONGRUENT to triangle COB.
PROVE.
how are two points parallel?
why label points with two letters?
even if AC and DB are lines, how can they both be parallel and bisect each other?
You got some serious problems with the geometry.
Anyway, I expect SAS will help some here. Try some ideas and come back with your work if you get stuck.