A cone is a three-dimensional shape produced by creating a pyramid with a disc as the base. It is also the segmentotope between a disc and a point.
Structure and Sections[]
A right circular cone is composed of one disc as a base with all points on the circle joined to a point a set distance from the center. The surface created from the process is known as a nappe segment.
A 1-dimensional shape that creates a boundary of a planar intersection within the cone is called a conic section, or simply conic. The non-degenerate conics are the ellipse, the parabola, and the hyperbola, with the circle usually considered one in its own right.