A = (1, 1)
c = Circle(A, 5.0)
C = Point(c)
a = Segment(A, C)
b = OrthogonalLine(C, a)
d = Circle(C, 6.0)
B, D = Intersect(d, b)
e = Segment(A, B)
mnogokotnik1, c_1, a_1, b_1 = Polygon(A, B, C)
α = Angle(C, B, A)