1. (4x+20) = 62
(6y) = 72
they are both alternate interior angles.
2. vertical angles = 5 and 8, 6 and 7.
alternate interior angles = 3 and 6, 4 and 5.
corresponding angles = 2 and 6, 1 and 5, 4 and 8, 3 and 7.
alternate exterior angles = 1 and 8, 2 and 7.
same side interior angles = 4 and 6, 3 and 5.
same side exterior angles = 2 and 8, 1 and 7.
adjacent angles or linear pair = 1 and 2, 3 and 4 5 and 6, 7 and 8, 1 and 3, 2 and 4, 5 and 7, 6 and 8.