Points mobiles : M, E

A = Intersect(yAxis, zAxis)
S = (0, 0, 7)
a, c, b = Cone(A, S, 5)
C = Point(xAxis)
d = OrthogonalLine(C, xOyPlane)
M = Point(d)
e = Plane(M, xOyPlane)
f = IntersectPath(e, a)
g = IntersectPath(xOyPlane, a)
E = Point(c)
h = Segment(E, S)
F = Intersect(h, f)
poly1, b_1, e_1, a_1 = Polygon(E, A, S)
G = Intersect(zAxis, e)
poly2, b_2, f_1, g_1 = Polygon(F, G, S)
i = Segment(C, A)
j = Segment(M, G)
α = Angle(F, G, S)
β = Angle(E, A, S)
k = Segment(C, M)