A = (0, -4)
B = (7, -4)
C = (1, 0)
poli1, c, a, b = Polygon(A, B, C)
D = (-8, -4)
A' = Dilate(A, 2, D)
B' = Dilate(B, 2, D)
C' = Dilate(C, 2, D)
poli1', c', a', b' = Polygon(A', B', C')
α = Angle(A, C, B)
β = Angle(A', C', B')
γ = Angle(C, B, A)
δ = Angle(C', B', A')
ε = Angle(B, A, C)
ζ = Angle(B', A', C')