A = (2, -3)
B = (2, 1)
Vieleck1, a, b, c, d, e, f, C, D, E, F = Polygon(A, B, 6)
α = Angle(E, D, C)
G = Intersect(d, e)
H = Intersect(c, d)
g = Ray(G, H)
I = Intersect(c, d)
J = Intersect(b, c)
h = Ray(I, J)
β = Angle(h, g)
K = Intersect(b, c)
L = Intersect(a, b)
i = Ray(K, L)
M = Intersect(a, f)
j = Ray(L, M)
N = Intersect(e, f)
k = Ray(M, N)
O = Intersect(d, e)
l = Ray(N, O)