Answer:
a° = 58°
b° = 48°
c = 74°
d° = 122°
Step-by-step explanation:
Angles on a straight line add up to 180°
58° + d° = 180°
d° = 180° - 58° = 122°
Alternate angles are equal.
a° = 58°
Angles in a triangle add up to 180°.
48° + 58° + c° = 180°
106° + c° = 180°
c° = 180° - 106° = 74°
Angles on a straight line add up to 180°
74° + 58° + b° = 180°
132° + b° = 180°
b° = 180° - 132° = 48°
