a = 5 (slider from 0 to 10, step 0.5)
b = 5 (slider from 0 to 10, step 0.5)
c = 5 (slider from 0 to 10, step 0.5)
A = (-2.1286915228818564, -1.4516046468893864)
B = Point(Circle[A, a])
d = Segment(A, B)
C = Point(Circle[B, b])
e = Segment(B, C)
D = Point(Circle[C, c])
f = Segment(C, D)