First of all, you should know several ways to judge congruent triangles. It should be angular, angular. I am in high school, and I forget whether there are three or four ways to judge this in junior high school. You can check your math book.

Then, draw two triangles on the draft paper and mark them with letters.

Finally, according to the conditions it gives you, mark them one by one, and then judge according to the theorem.

I'll show you one and the rest is up to you. I hope what I said will make you understand. You can't upload pictures here, so it's hard to say.

For example (a), after drawing two triangles on paper, mark the known equilateral and equilateral sides according to the conditions, and find that triangle ABC is a "vertex angle".

The triangle DEF is an "angle", which is different, so A is wrong.

Think it over. Add 44759 17 if you don't understand.

My answer is a, I hope it's right!