The pair of angles that will prove that the lines are parallel are
angle 2 and angle 6
angle 1 and angle 8
How to find the angles
Angle 2 and angle 6 are corresponding angles
Corresponding angles are pairs of angles formed when a straight line intersects two parallel lines.
In this case, angle 2 and angle 6 are located in corresponding positions at each intersection point. If they are are congruent, then the lines are parallel
angle 1 and angle 8 are alternate exterior angles
Alternate exterior angles are pairs of angles formed when a transversal intersects two parallel lines.
Alternate exterior angles (angle 1 and angle 8) are located on opposite sides of the transversal and on the exterior of the region between the parallel lines. If these angles (angle 1 and angle 8) are congruent, the lines are parallel