ΘΕΩΡΗΜΑ 
Δύο οξείες γωνίες που έχουν τις πλευρές τους κάθετες είναι ίσες

A = (1.48, 1.12)
B_1 = (12.280000000000001, 1.1)
a = Line(A, B_1)
C = (7.1000000000000005, 5.22)
b = Line(A, C)
B = (9.86, -2.92)
c = OrthogonalLine(B, a)
E = Intersect(a, c)
d = OrthogonalLine(B, b)
F = Intersect(b, d)
α = Angle(B_1, A, C)
β = Angle(E, B, F)
G = Intersect(d, a)
γ = Angle(F, G, A)
δ = Angle(B, G, E)
ε = Angle(A, F, G)
ζ = Angle(G, E, B)