1. All triangles add up to 180°, so you can make an equation like this:
2. As for which angle corresponds to ∠A, we know that ∠A is across from ∠B which is 60.8°. We know that in the other triangle, ∠Z=60.8° as well and ∠Y is right across from it. Therefore, <u>∠Y corresponds to ∠A</u>.
3. It would be useful to know the options you have for this one. I'd say they're <u>similar</u> (if that's an option).