A = (1.1697795822752801, 3.5619895960138)
B = (3.2333934157106365, 6.556252805312161)
a = Segment(A, B)
B' = Rotate(B, 250.00000000000003*°, A)
α = Angle(B', A, B)
b = Ray(A, B')
D = Point(b)
c = Line(D, a)
C = Point(c)
β = Angle(C, D, A)
đa giác1, a_1, b_1, d, c_1 = Polygon(A, B, C, D)