Vertical angles are congruent. Therefore:
2 = 5, 1 = 6, 3 = 8, and 4 = 7.
Alternate exterior angles are also congruent. Therefore:
4 = 5, 1 = 8
Alternate interior angles are also congruent. Therefore:
3 = 6, 2 = 7
Corresponding angles are also congruent. Therefore:
3 = 1, 4 = 2, 5 = 7, 8 = 6.
So,
1 and 3 ARE congruent.
2 and 4 ARE congruent.
6 and 7 ARE NOT.
3 and 6 ARE congruent
