A = (-0.64, 4.48)
B = (1.1, 3.42)
C = (0.28, 0.94)
D = (-1.24, 3.62)
poly1, a, b, c, d = Polygon(A, B, C, D)
poly2, e, f, g, h, E, F = Polygon(D, A, 4)
poly3, i, j, k, l, G, H = Polygon(A, B, 4)
poly4, m, n, p, q, I, J = Polygon(B, C, 4)
poly5, r, s, t, a_1, K_1, L_1 = Polygon(C, D, 4)
K = Midpoint(H, B)
L = Midpoint(B, I)
M = Midpoint(C, K_1)
N = Midpoint(D, E)
b_1 = Segment(L, N)
c_1 = Segment(K, M)
texte1: "MK = " + c_1 + ""
texte2: "NL = " + b_1 + ""
O = Intersect(b_1, c_1)
α = Angle(L, O, K)