A = (4.367904651971458, 0.34857180167848084)
B = (-2.090636181879403, -4.467967125261144)
a = Segment(A, B)
C = (13.709071055733155, -4.650411781584615)
b = Segment(B, C)
c = Segment(C, A)
d = Ray(B, A)
e = Circle(C, A)
đa giác1, c_1, b_1, a_1 = Polygon(B, A, C)
A' = Intersect(e, d, 2.0)
E = (-5.557084652025345, -12.459043072229159)
F = (-2.7839258759085914, -12.495532003493853)
f = Segment(E, F)
g = Circle(A, f)
h = Circle(A', f)
G = Intersect(e, g, 1.0)
H = Intersect(e, h, 2.0)
k = CircleArc(C, H, G)
i = Segment(C, A')
α = Angle(C, B, A)