a

a

a

a

a

a

a

a

α

β

γ

δ

a = 5 (slider from 1 to 5)
A = (-20, 0)
B = Point(Circle[A, a])
f = Segment(A, B)
C = Point(Circle[B, a])
g = Segment(B, C)
D = Point(Circle[C, a])
h = Segment(C, D)
E = Point(Circle[D, a])
i = Segment(D, E)
F = (-10, -2)
G = (-6, -2)
c = Circle(F, a)
d = Circle(G, a)
H, I = Intersect(c, d)
j = Segment(F, H)
k = Segment(G, H)
l = Segment(G, I)
m = Segment(F, I)
α = Angle(D, E, B)
β = Angle(E, B, C)
γ = Angle(B, C, D)
δ = Angle(C, D, E)
ε = Angle(I, F, H)
ζ = Angle(F, H, G)
η = Angle(H, G, I)
θ = Angle(G, I, F)