Question

If angle 4 is 42° and lines M and N are parallel, give a reason why angle 5 is also 42°.
A. Angle 4 and angle 5 are corresponding angles, so their measures are congruent.
B. Angle 4 and angle 5 are alternate interior angles, so their measures must be the same.
C. Angle 4 and angle 5 are vertical angles, so their measures are congruent.
D. Angle 4 and angle 5 are interior angles, so their measures must be the same.

Answer 1

A. Angle 4 and angle 5 are corresponding angles, so their measures are congruent.

Reason: When two parallel lines are cut by a transversal, corresponding angles are equal, so angle 5 = 42°.