A = (1.5947458758547042, 1.9905737085897166)
B = (-3.513704501202474, -3.008409874673379)
C = (15.278095100115003, -2.8624541496146025)
đa giác1, c, a, b = Polygon(A, B, C)
K = Mirror(A, a)
đa giác2, c_1, b_1, a' = Polygon(B, K, C)
d = Segment(A, K)
H = Intersect(d, a)
e = Segment(A, H)
f = Segment(H, K)
α = Angle(K, H, C)
β = Angle(A, H, B)