Step-by-step explanation:
as , sum of both the angles on the same side of transversal is 180°
so,
Angle 2 + angle 5 = 180°
123° + angle 2 = 180°
Angle 2 = 180° - 123° = 57°
angle 2 = 57°
and
angle 1 = 123° ( Alternate Interior Angle )
hope this answer helps you dear...take care!
