A = (8.86, 0.1)
B = (14.34, 0.38)
C = (2.52, -5.14)
poly1, c, a, b = Polygon(A, B, C)
d, e = AngularBisector(c, b)
f, g = AngularBisector(a, c)
D = Intersect(g, e)
α = Angle(A, D, B)