Tri doppio

A = (-1.4893659375649002, 0.8294760756941031)
B = (2.456977839543732, 0.8291996393209063)
C = (1.2052213422460343, 2.01419579009606)
poli1, c, a, b = Polygon(A, B, C)
D = Midpoint(a)
E = Midpoint(b)
F = Midpoint(c)
A' = Mirror(A, D)
B' = Mirror(B, D)
C' = Mirror(C, D)
poli1', c', a', b' = Polygon(A', B', C')
A'_1 = Mirror(A, E)
B'_1 = Mirror(B, E)
C'_1 = Mirror(C, E)
poli1'_1, c'_1, a'_1, b'_1 = Polygon(A'_1, B'_1, C'_1)
A'_2 = Mirror(A, F)
B'_2 = Mirror(B, F)
C'_2 = Mirror(C, F)
poli1'_2, c'_2, a'_2, b'_2 = Polygon(A'_2, B'_2, C'_2)