A = (-1.3242027325332715, 2.70038416723615)
B = (-0.7106364275495205, 2.259875025196534)
poly1, a, b, c, d, e, f, g, h, i, j, k, l, C, D, E, F, G, H, I, J, K, L = Polygon(A, B, 12)
m = Ray(I, J)
α = Angle(m, j)
n = Ray(I, H)
β = Angle(m, n)