A = Point(xAxis)
B = Point(yAxis)
C = Point(xAxis)
D = Point(yAxis)
poly1, a, b, c, d = Polygon(A, B, C, D)
S = Point(zAxis)
e, faceABE, faceBCE, faceCDE, faceADE, arêteAE, arêteBE, arêteCE, arêteDE = Pyramid(poly1, S)
O = (0, 0)
J = Midpoint(S, O)
v: (1 / 3 * Vector[S, D])
K = Translate(S, v)
u = Vector(S, K)
f = Segment(S, O)
poly2, c_1, b_1, j = Polygon(B, J, C)