Question

H

Answer 1

A fact you need to know about parallel lines: Interior angles on the same side of the transversal are supplementary, so for example, angle4+angle5 = 180.

Answer 2

Oh, hey well, you actually should probably start with the fact that corresponding angles are congruent. Just realized that.
So basically you can say:
6 congruent to 2 because they are corresponding.
2 congruent to 4 because they are vertical angles.
Therefore 6 is congruent to 4.
Notice that 5+4 is a straight angle. So what can we say about 5+6?