Answer:
see explanation
Explanation:
(i)
∠ AOB is a straight line , straight angle = 180°
(ii)
∠ ZOB = c = 23°
(iii)
∠ XOY = b = 33°
(iv)
∠ AOY = a + b = 74° + 33° = 107°
(v)
∠ YOZ = x = 180° - (a + b + c)
= 180° - (74 + 33 + 23)°
= 180° - 130°
= 50°