A = (2.951092827499933, 7.407216586042382)
B = (-1.442554164107732, 2.0681012544685107)
C = (7.900897666146542, 1.7344065462451437)
đa giác1, c, a, b = Polygon(A, B, C)
d = Ray(A, B)
e = Ray(A, C)
f, g = AngularBisector(b, a)
h, i = AngularBisector(c, a)
j = AngularBisector(B, A, C)
D = Point(d)
E = Point(e)
α = Angle(D, B, C)
β = Angle(B, C, E)