A = (-1.1734154236760244, 0.8948167193461274)
B = Point(Circle[A, 5.6])
a = Segment(A, B)
B' = Rotate(B, 253.99999999999997*°, A)
α = Angle(B, A, B')
b = Line(A, B')
c = LineBisector(A, B)
d = OrthogonalLine(A, b)
M = Intersect(c, d)
e = Circle(M, B)
C = Point(e)
Vieleck1, c_1, a_1, b_1 = Polygon(A, B, C)
β = Angle(A, C, B)