A est mobile sur [ED]

F = (5, -1)
D = (5, -5)
E = Point(yAxis)
a = Segment(F, D)
b = Segment(D, E)
c = Segment(E, F)
A = Point(b)
d = OrthogonalLine(A, b)
B = Intersect(d, c)
e = Line(B, b)
C = Intersect(e, a)
poly1, a_1, b_1, c_1, d_1 = Polygon(A, B, C, D)
g = Segment(E, A)
h: 5.0 - g
S = (0, -5.2)
T: (x(A), -(5.2))
u = Vector(S, T)
v = Vector(T, S)
G: (x(A), poly1)
i = Segment(G, B)
j = OrthogonalLine(G, yAxis)
H = Intersect(j, yAxis)
k = Segment(H, G)
I = Midpoint(E, A)
distanceEA = Distance(E, A)
J: (-1.0, poly1 - 0.1)
texte5: "  " + poly1
texte3: "AB = " + a_1 + " m"
texte2: "Aire du rectangle ABCD : " + poly1 + " m²"
texte1: "    = " + g + "m"
K: (g / 2.0, -(5.66888))
f = Function(4.0 * x - 4.0 * x * x / 5.0, 0.0, 5.0)