A = (-5.611627906976738, 5.39423255813952)
B = (-5.2514418604651105, -0.9765581395348867)
C = (1.4795348837209235, 5.66437209302324)
многокутник1, c, a, b = Polygon(A, B, C)
d = AngularBisector(A, B, C)
e = AngularBisector(C, A, B)
D = Intersect(d, e)
f = OrthogonalLine(D, c)
E = Intersect(f, c)
α = Angle(D, E, B)
g = Circle(D, E)