Answer:
see explanation
Step-by-step explanation:
The sum of the 3 angles in a triangle = 180°
Subtract the sum of the 2 given angles from 180 for third angle
∠C = 180° - (50 + 75)° = 180° - 125° = 55°
∠B = 180° - (60 + 30)° = 180° - 90° = 90°
∠A = 180° - (45 + 30)° = 180° - 75° = 105°
