Answer: a=58 and b=103
Step-by-step explanation: the vertical angle of 58 is the corresponding angle of a. Vertical angles are congruent and corresponding angles are congruent.
Angle of a straight line=180. So 180-77=103. The supplementary angle of 77 (or the angle that is 103) is the corresponding angle of b. As previously stated, corresponding angles are congruent.
