A = (4.941776025498012, -6.242656054953084)
B = (-0.6642506869868146, -6.242656054953084)
a = Segment(A, B)
b = OrthogonalLine(A, a)
C = Point(b)
đa giác1, b_1, c, a_1 = Polygon(C, A, B)
E = (7.164283657074836, -6.176312543562734)
d = Circle(E, b_1)
e = Circle(E, c)
F = Point(d)
f = Segment(E, F)
g = OrthogonalLine(E, f)
D = Intersect(e, g, 2.0)
đa giác2, e_1, f_1, d_1 = Polygon(D, E, F)
α = Angle(C, A, B)
β = Angle(F, E, D)