Given that ab is a diameter of circle o, find the missing angle arc measures.

Part 1)

Part 2)

Part 3)

Part 4)

Part 5)

Step-by-step explanation:

Part 1) Find the measure of arc CB

we know that

-----> by central angle

we have

----> given problem

so

Part 2) Find the measure of angle AOC

we know that

------> by supplementary angles

we have

substitute

Part 3) Find the measure of arc AD

we know that

The inscribed angle measures half that of the arc comprising

so

we have

substitute

Part 4) Find the measure of arc DFB

we know that

we have

-----> because is a diameter

substitute

Part 5) Find the measure of angle CDB

we know that

The inscribed angle measures half that of the arc comprising

so

we have

substitute