A = Intersect(xAxis, zAxis)
c = Circle(A, sqrt(2), zAxis)
B = Point(zAxis)
a, d, b = Cone(A, B, sqrt(2))
C: (0, 0, 1)
e = Sphere(C, 1)
D = Point(d)
E = Point(d)
f = Segment(B, D)
g = Segment(B, E)