A = (2.7600000000000002, 1.16)
B = (0.03412719891745601, -1.8789174560216506)
C = (6.28, -1.78)
poly1, c, a, b = Polygon(A, B, C)
d = Line(A, a)
α = Angle(C, B, A)
D = Point(d)
β = Angle(D, A, B)
γ = Angle(A, C, B)
E = Point(d)
δ = Angle(C, A, E)