Answer:
A | B because 125 + 55 equal 180 which makes them supplementary angles therefor making a true statement of Lines A and B being parallel
Step By Step:
Since you have two parallel lines and a third line that intersects them. The intersecting line is called a transversal line.
When a transversal line intersects with two parallel lines it creates 8 angles.
These 8 angles will form pairs ex: The known angle of 125 and the line beneath it in the same position will have the same angle measurement thus forming a pair.
Corresponding angles are congruent.
All angles have the same position with regards to the parallel lines and the traversal are corresponding. All corresponding angles are congruent (holds the same value)
All angles whether exterior or interior, alternate or corresponding are all congruent.
Using this information you would come up with an equation to prove both lines are parallel.
