I have a few questions that I don't completely understand and those are:
1. What does congruence mean for triangles? [I didn't think it "meant" anything for triangles other than the fact that they are congruent]
2. Do two congruent triangles have the same area?
3. Are all triangles with the same area congruent?
I find all this confusing even though it's pretty basic.
EDIT: Have a look here: Congruent Triangles