A = (3.68, -0.46)
B = (5.2, 1.72)
C = (15.34, 1.7)
f = Line(B, C)
g = Line(A, f)
h = Line(A, B)
D = Point(f)
E = Point(h)
F = Point(g)
G = Point(g)
H = Point(h)
α = Angle(C, B, E)
β = Angle(G, A, B)
γ = Angle(E, B, D)
δ = Angle(B, A, F)
ε = Angle(F, A, H)
ζ = Angle(H, A, G)
η = Angle(D, B, A)
θ = Angle(A, B, C)