Answer:
A is 55°
B is 60°
Step-by-step explanation:
A + 125° = 180° (since they're in a straight line, they're a linear pair. Sum of the angles equals 180°)
A = 180° - 125°
A = 55°
A + B + 65° = 180°
A, B and 65° are angles of a triangle, so the sum of these 3 angles equals 180°
A + B + 65° = 180°
Since angle A equals 55°,
55° + B + 65° = 180°
120° + B = 180°
B = 180° - 120°
Angle B equals 60°
