A = (0.1584632440730026, 3.0762834726249393)
B = (8.66972027972027, 3.0366962305986727)
a = Segment(A, B)
b = OrthogonalLine(B, a)
C = Point(b)
c = OrthogonalLine(C, b)
B' = Rotate(B, 295.0*°, A)
α = Angle(B', A, B)
d = Ray(A, B')
D = Intersect(c, d)
đa giác1, a_1, b_1, c_1, d_1 = Polygon(A, B, C, D)
Y = Angle(C, D, A)
β = Angle(B, C, D)
γ = Angle(A, B, C)