A: (0, 3.5)
B: (0, -3.5)
c = Circle(B, 5.5)
C, D = Intersect(c, xAxis)
O = Intersect(xAxis, yAxis)
d = Circle(O, D)
V: (0, 0, 3.5)
Midpoint(O, D)
f = Segment(O, D)
a, e, b = Cone(O, V, f)
v': (0, 0, -3.5)
V': (0, 0, -3.5)
g, h, i = Cone(O, V', f)
j = Line(V', V)