Each arc subtends half its measure, so c = 86/2=43 and a=54/2=27. That's true for the tangent as well.
If we get to assume that center point is indeed the center of the circle, there's an isosceles triangle with two angles a and 2a=54 degrees so the center angle is 180-54=126 so b=126/2=63, a+b+c=27+63+43=133
First choice
