Answers
∠3 and ∠1 = linear pair - adjacent on a straight angle
∠3 and ∠4 = linear pair - adjacent on a straight angle
∠ 3 and ∠2 = vertical - opposite angles
∠ 3 and ∠7 = corresponding - they are in the same position
∠ 3 and ∠6 = alternate interior angle - alternate sides of the transversal between the parallel lines