Answer:
125
Step-by-step explanation:
[tex]a = \frac{1}{2} \times 90 \degree \\ \\ a = 45 \degree \\ \\ b =\frac{1}{2} (360\degree - 200\degree) \\ \\ b = 80\degree \\ \\
a + b = 45 + 80 \\ \\ a + b = 125 \degree[/tex]
