Find the radius of a circle with an angle of 120 degrees and a sector of 66.99?

120 degrees is 1/3 of a whole circle.

So sector of 66.99 is 1/3 of the whole circumference

ie circumference = 66.99*3

Then 2*pi*r = 66.99*3

so that r = 66.99*3/(2*pi) = 31.985