Question

If angle 4 is 42 deg and lines M and N are parallel, give a reason why angle 5 is also 42

Answer 1

If lines M and N are parallel, then angle 4 and angle 5 are corresponding angles. Corresponding angles formed by a transversal and two parallel lines are congruent. Therefore, if angle 4 measures 42 degrees, then angle 5 must also measure 42 degrees.