In my school, we do congruent statements with triangles by using SSS,ASA, SAS, etc.
For the first one, it would be SSS because the side-side-side matches up with side-side-side.
For the second one, I believe they are not similar because the lengths are corresponding between the two triangles.
Hope this helps! :)
If you need any help on triangle congruency statements, I have a flip-booklet we made in our geo class that helps a lot, and I would love to send it to you!
