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Answer:
∠2 = 45°
Step-by-step explanation:
Angles 1 and 2 are same-side interior angles where the transversal crosses parallel lines. That means they are supplementary angles.
∠1 +∠2 = 180° . . . . . supplementary angles total 180°
135° +∠2 = 180° . . . . substitute the given value
∠2 = 180° -135° . . . . subtract 135°
∠2 = 45°
