R = 2.4 (slider from 0 to 5, step 0.1)
I = (6.020364000000001, 3.8511439999999997)
c = Circle(I, R)
I' = (12.752364000000002, 3.741144)
d = Circle(I', R)
a = Segment(I, I')
O = Midpoint(a)
M = Point(c)
b = Line(M, O)
M' = Intersect(d, b, 2.0)
e = Segment(M, M')