Answer:
60
Step-by-step explanation:
from triangle 1:
59+45+∠a = 180
∠a = 180-59-45 = 76
∠a+44+∠b = 180
∠b = 180-∠a-44 = 180-76-44 = 60
in triangle 2:
∠?+60+∠b = 180
∠? = 180-∠b-60 = 180-60-60 = 60
∠? = 60
