Α = (-5.178916491284211, 2.000755349620025)
Β = (11.057854372404828, 1.7747214164828213)
λ = 11.7 (slider from 0 to 20)
c = Circle(Α, λ)
d = Circle(Β, 20 - λ)
Γ = Intersect(c, d, 1)
f = Segment(Α, Γ)
g = Segment(Γ, Β)