A = (7.658143632470779, -4.53492671640212)
C = (11.141461442218052, -4.577666812227237)
a = Segment(A, C)
b = OrthogonalLine(A, a)
B = Point(b)
đa giác1, b_1, c, a_1 = Polygon(B, A, C)
D = (13.150245945998684, -4.556296764314678)
d = Circle(D, c)
F = Point(d)
e = Segment(D, F)
f = Circle(D, b_1)
g = OrthogonalLine(D, e)
E = Intersect(f, g, 2.0)
đa giác2, e_1, f_1, d_1 = Polygon(E, D, F)
α = Angle(F, D, E)
β = Angle(C, A, B)