Question

Two parallel lines are crossed by a transversal.

Horizontal and parallel lines b and c are cut by transversal a. At the intersection of lines b and a, the bottom right angle is 50 degrees. At the intersection of lines c and a, the top left angle is y degrees.
What is the value of y?

y = 30
y = 50
y = 110
y = 130

Answer 1

y = 50

Reason: The given angles are alternate interior angles formed by a transversal cutting two parallel lines, so they are congruent.