Question

Select all pairs of alternate interior angles. assume the lines are parallel.

Answer 1

you have to look at the angles inside the parallel lines. The transversal that cuts through the 2 parallel lines creates 4 angles. The alternate interior angles are the angles that are "diagonal" from eachother. Because they are Alternate interior angles they are also congruent. So your answers should be:

3 and 6
4 and 5

Answer 2

it is 3 and 6, and 4 and 5