Hello! I have to write a 2 column proof.
Given: ABDF is a parallelogram.
Prove: Triangle CBD is similar to Triangle DEF.
All I have so far is the black annotated markings on parallelogram ABDF, which is what I know of parallelograms. I don't know how to prove them similar yet. And all I have so far for the proof:
|ABDF is a parallelogram||given|
|DB parallel to FA, DF parallel to BA||definition of parallelogram|
|Angle DBF = Angle DFA, Angle BDF = Angle BAF||Opposite angles congruent|