Answer:
B. 61
Step-by-step explanation:
The sum of arcs around a circle is 360°. This means ...
110° +128° +c° = 360°
c° = 122° . . . . . . . . . . . . . subtract 238°
__
An inscribed angle in a circle has half the measure of the arc it subtends.
a° = 1/2c° = 1/2(122°) = 61°
__
The other angles in the diagram are ...
b° = 1/2(110°) = 55°
d° = 1/2(128°) = 64°
