A = (5.439352360925659, 1.61905004480374)
C = (0.09869969400224501, -2.295217127227085)
D = (16.286516473248373, -3.0913392639113115)
đa giác1, c, a, b = Polygon(A, C, D)
B = Mirror(A, a)
đa giác2, c_1, b_1, a' = Polygon(C, B, D)
α = Angle(C, A, D)