RA = 5 (slider from 0 to 5, step 0.1)
C = Intersect(xAxis, yAxis)
a = Circle(C, RA)
RB = 3.7 (slider from 0 to 5, step 0.1)
RC = 1.4 (slider from 0 to 5, step 0.1)
b = Circle(C, RB)
c = Circle(C, RC)