Find the value of b.

Answer:
C.
Step-by-step explanation:
We have to halve the difference of the intercepted arcs.
I knew the bigger arc's measurement was 180 degrees because it's central angle is 180 degrees.
So you have to perform the following operations:
[tex]\frac{1}{2}(180-35)[/tex]
[tex]\frac{1}{2}(145)[/tex]
[tex]\frac{145}{2}[/tex]
[tex]72.5[/tex]
C.