Que peut-on prévoir sur l'aire du parallélogramme ABCD ?

A = (0.30000000000000027, -0.6)
B = Point(Circle[A, 6])
a = Segment(A, B)
c = Circle(A, 4)
b = OrthogonalLine(A, a)
E = Intersect(c, b, 2)
d = OrthogonalLine(E, b)
e = OrthogonalLine(B, a)
F = Intersect(d, e)
poly1, e_1, f, b_1, a_1 = Polygon(E, F, B, A)
D = Point(c)
I = Midpoint(D, B)
C = Mirror(A, I)
poly2, b_2, c_1, d_1, a_2 = Polygon(B, C, D, A)
α = Angle(B, A, E)
β = Angle(E, F, B)
γ = Angle(F, B, A)
distanceEA = Distance(E, A)
TexteEA: "" + (Name[E]) + (Name[A]) + " = \, " + distanceEA + " cm"
distanceEF = Distance(E, F)
TexteEF: "{" + (Name[E]) + (Name[F]) + "}  = \, " + distanceEF + " cm"
G = Intersect(f, c_1)
poly3, b_3, g, c_2 = Polygon(G, C, B)
poly4, g_1, d_2, a_3, b_4 = Polygon(G, D, A, B)
h = Line(G, D)
H = Intersect(a_1, h)
poly5, a_4, h_1, d_3 = Polygon(H, D, A)
Transformer = 0.6000000000000005 (slider from -5 to 5, step 0.1)
δ = Angle(B, A, D)
ε = Angle(A, E, F)
J = Intersect(a_1, c_1)
i = Line(J, C)
K = Intersect(f, i)
poly6, a_5, d_4, j = Polygon(D, J, A)
poly7, j_1, c_3, b_5, a_6 = Polygon(J, C, B, A)
poly8, b_6, c_4, c4 = Polygon(C, K, B)