Dreieck spiegeln

A = (-2.701046116418018, -4.1195184429895155)
B = (1.0054402346964313, -2.201876855926443)
c = Segment(A, B)
C = (-2.128615791921578, 1.418744946513542)
a = Segment(B, C)
b = Segment(C, A)
D = (2, 5)
E = (2, -3)
d = Line(D, E)
B' = Mirror(B, d)
C' = Mirror(C, d)
e = Segment(B', C')
A' = Mirror(A, d)
f = Segment(A', B')
g = Segment(C', A')
h = false
poly1, c_1, a_1, b_1 = Polygon(A, B, C)
poly2, c', b', a' = Polygon(B', A', C')
α = Angle(B, A, C)
β = Angle(A, C, B)
γ = Angle(C, B, A)
δ = Angle(C', A', B')
ε = Angle(A', B', C')
ζ = Angle(B', C', A')