B = (3.273856432052507, 4.978195167979241)
C = (6.814370361966109, 4.978195167979241)
a = Segment(B, C)
B' = Rotate(C, 300.00000000000006*°, B)
α = Angle(B', B, C)
b = Line(B, B')
A = Point(b)
c = Line(A, a)
D = Point(c)
E = Point(c)
β = Angle(B, A, E)
d = Segment(C, D)
e = Segment(B, A)
f = Ray(D, A)
đa giác1, a_1, c_1, d_1, b_1 = Polygon(B, A, D, C)