Answer:
Not enough information (or maybe there is a diagram you didn't include?)
Explanation:
Let's first use a part in the question that says ABC is similar to DEF. This means that side AB is paired with DE, BC with EF, and AC with DF. (This is because A is in the 1st spot, B in the 2nd, and C is in the 3rd, so we have to pair it up the same way with DEF). Because there are no complete pairs, we need more information.