In the diagram below, lines a and b are parallel and cut by transversal, t. if angle 3 is 120 degrees, find the measure of angle 7. a: 60 b: 90 c: 120 d: 180

Lines a and b are parallel and cut by the same transversal, t. Since we know these lines are parallel, we can find the measure of angle 7 quite easily.

Angles 3 and 7 are corresponding angles, which means that the two angles are in the same relative position. Thus, they are equivalent.

Angle 3 = angle 7 = 120 degrees

The correct answer is C. 120.

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