Polígono rojo = Polígono[D + (nada, nada), E + (nada, nada), F + (nada, nada)]

F = (6.399999999999999, 4.179999999999998)
E = (4.159999999999999, -0.10000000000000228)
D = (2.459999999999999, 1.6199999999999977)
nada = 0
A = (-2.28, 2.18)
B = (0.96, 0.58)
C = (2.42, 4.36)
poly2, a_1, b_1, c_1 = Polygon(D + (nada, nada), E + (nada, nada), F + (nada, nada))
poly1, c, a, b = Polygon(A, B, C)