Using rectangular coordinates, a cone is described as z = ax^2+ay^2, bounded by z = [0, h], (see interval notation) where h is the height of the cone and a is sort of the slope of the cone. Unless of course the cone is that really cool double-cone used to derive the conic sections, which would be notated z = ±(ax^2+ay^2) for any real z.

# right circular cone (thing)

See all of right circular cone, there is 1 more in this node.