What angle relationship best describes angles afc and efc? vertical angles complementary angles linear pair supplementary angles

When you are making a circle graph by hand, how do you convert a number for a part into its corresponding angle measure in the circle graph? when you are making a circle graph by hand, what should you do if one of your angle measures is greater than 180°?

F(x)= 4x g(x) =x-1 what is f(x) divided by g(x)

Don't know how to find x given these segment lengths