A = (2.3576880702671303, 5.703333584832434)
B = (13.837536387597371, 5.703333584832434)
a = Segment(A, B)
b = OrthogonalLine(A, a)
c = OrthogonalLine(B, a)
C = Point(c)
d = OrthogonalLine(C, c)
D = Intersect(b, d)
đa giác1, a_1, b_1, c_1, d_1 = Polygon(A, B, C, D)
α = Angle(D, A, B)
β = Angle(A, B, C)
γ = Angle(B, C, D)
δ = Angle(C, D, A)