Answered

Use ΔABC below to answer the question that follows:

Triangle ABC with sides BA and BC intersected by line DE.

Which fact is not used to prove that ABC is similar to DBE?

The sum of angles A and B are supplementary to angle C.
Segments AC and DE are parallel.
AB is a transversal line passing AC and DE.
Angle B is congruent to itself due to the reflexive property.