Answer:
Angle 2 = 45
Step-by-step explanation:
"The Alternate Interior Angles Theorem states that, when two parallel lines are cut by a transversal , the resulting alternate interior angles are congruent."
This means that angle 1 and angle 3 are equal. This can be shown by drawing a mirrored F.
Since angles on a straight line add up to 180.
Angle 2 + Angle 3 = 180
Angle 2 + 135 = 180
Angle 2 = 180 - 135
Angle 2 = 45
