1. 1 and 6, 2 and 5, 3 and 8, 4 and 7, 9 and 11, 10 and 12
2. 1 and 5, 2 and 6, 3 and 7, 4 and 8
3. Alternate interior angles
4. Not sure about this one
5. Alternate exterior angles
6. Vertically opposite angles
7. Interior opposite angles
8. Alternate interior angles
9. Corresponding angles
10.alternate exterior angles
