O A. 17 degrees
O B. 163 degrees
O C. 73 degrees
![O A 17 degrees O B 163 degrees O C 73 degrees class=](https://us-static.z-dn.net/files/d4d/a3f4e4bf63b68d499d5571f13ef444a9.png)
Answer: B 163 degrees
Step-by-step explanation:
That's an obtuse angle, bigger than 90 degrees, so we read the appropriate upper scale for the angle.