afficher la droite(IL)

A = Point(zAxis)
B = Point(xAxis)
C = Point(yAxis)
D = (3, 0, 0)
poly1, d, b, c = Polygon(B, C, D)
a, faceABC, faceACD, faceABD, arêteAB, arêteAC, arêteAD = Pyramid(poly1, A)
I = Midpoint(A, B)
K = Midpoint(D, C)
u: (2 / 3 * Vector[B, C])
J = Translate(B, u)
v = Vector(B, J)
w: (2 / 3 * Vector[A, D])
L = Translate(A, w)
e = Vector(A, L)
poly2, i, j, k, l = Polygon(I, J, K, L)
B' = Mirror(B, D)
f = Segment(D, B')
g = Line(I, L)
h = Line(J, K)