Spostare i vertici del quadrato sulla griglia, 
notando che la sua area ...
Come spiegarlo?

A = (1, 1)
B = (3, 0)
poly1, a, b, c, d, C, D = Polygon(A, B, 4.0)
E = (3, 2)
poly2, c_1, b_1, e = Polygon(B, E, C)
F = (2, 2)
poly3, d_1, c_2, f = Polygon(C, F, D)
G = (2, 1)
poly4, a_1, d_2, g = Polygon(D, G, A)
H = (3, 1)
poly5, b_2, a_2, h = Polygon(A, H, B)
I = (5, 2)
J = (5, 0)
K = (6, 0)
L = (6, 2)
poly6, i, j, k, l = Polygon(I, J, K, L)
M = (-3, 1)
N = (-1, 0)
poly7, m, n, o, p, O, P = Polygon(M, N, 4.0)
Q = (0, 0)
R = (-1, 2)
poly8, n_1, q, o_1, r = Polygon(N, Q, O, R)
S = (0, 3)
T = (-2, 2)
poly9, o_2, s, p_1, t = Polygon(O, S, P, T)
U = (-3, 3)
V = (-2, 1)
poly10, p_2, u, m_1, v = Polygon(P, U, M, V)
W = (-3, 0)
Z = (-1, 1)
poly11, m_2, w, n_2, z = Polygon(M, W, N, Z)