Question

wo parallel lines are crossed by a transversal.

Horizontal and parallel lines k and l are cut by transversal j. At the intersection of lines k and j, the bottom left angle is 120 degrees. At the intersection of lines l and j, the top left angle is h degrees.
What is the value of h?

h = 60
h = 80
h = 100
h = 120

Answer 1

h = 60

Reason: The bottom-left angle at k and the top-left angle at l are consecutive interior angles (same side of the transversal between parallel lines), so they are supplementary: 120 + h = 180, hence h = 60.