A = (8, 3)
B = (12, 3)
Vieleck1, f, g, h, i, j, C, D, E = Polygon(A, B, 5)
k = Segment(A, C)
l = Segment(C, E)
m = Segment(E, B)
n = Segment(D, B)
p = Segment(D, A)
α = Angle(A, D, B)
F = Intersect(k, p)
G = Intersect(n, p)
q = Ray(F, G)
β = Angle(n, q)