C = (0, 4)
E = (5, 4)
D = (4, 1)
đa giác1, c, a, b = Polygon(C, E, D)
I = (2.008024042073631, 1.5169646882043564)
Z = Mirror(C, I)
Y = Mirror(E, I)
X = Mirror(D, I)
đa giác1', c', a', b' = Polygon(Z, Y, X)
d = Segment(C, Z)
e = Segment(E, Y)
f = Segment(X, D)