A: (0, 0)
B: (15, 0)
C: (15, 10)
D: (0, 10)
a = 6.4 (slider from 0 to 10, step 0.1)
M: (0, a)
O: (a, a)
Q: (a, 0)
N: (a, 10)
P: (15, a)
q2, a_3, q_1, o, m_1 = Polygon(A, Q, O, M)
q3, o_1, p_1, c_2, n_1 = Polygon(O, P, C, N)
f = Segment(A, B)
g = Segment(B, C)
h = Segment(C, D)
i = Segment(A, D)
texte1: "Aire grisée : " + (q2 + q3) + ""