Question

Geometry attachment...

Answer 1

<AOB = 5 degree
<COD = 15 degree

Answer 2

How do you solve for x? That is the part I could not figure out. Thank you.

Answer 3

let <COD = x degree
then <AOB =x/3

since for a straight line sum of all angles about a point on it is 180 degree
so
<COD + <AOB = 180 - 160
means
x + x/3 = 20
4x/3 = 20
4x = 20*3
x = 60/4
x = 15
so
<COD = 15
<AOB = 15/3 = 5