In the diagram, two parallel lines are intersected by a transversal. I

1.	In the diagram, two parallel lines are intersected by a transversal. If ∠2 - ∠1 = 30° , then ∠1 = ____.
A.	85°
B.	80°
C.	75°
D.	60°
Answer» D. 60°

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In the diagram, two parallel lines are intersected by a transversal. If ∠2 - ∠1 = 30° , then ∠1 = ____.

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