Construire la croix de malte à partir de l'octogone

A = (1.3, 6)
B = (7.38, 5.98)
poly1, f, g, h, i, j, k, l, m, C, D, E, F, G, H = Polygon(A, B, 8)
I = (18.864296889202485, 8.864244020749569)
J = (29.10898209267306, 8.837703385507417)