Answer:
The answer is "parabola."
Explanation:
Parabola- this is a symmetric open-plane curve that is formed by the intersection of a cone with a plane parallel to its side.
Degenerate Conic- this is generated when a plane intersects with the vertex of the cone.
Plane- a flat, two-dimensional surface that extends infinitely far.
Cone- a three-dimensional geometric shape that tapers smoothly from a flat base to a point called the apex or vertex.
In Mathematics, the degenerate form of a parabola is a line or two parallel lines. The degenerate form of a hyperbola is two intersecting lines while a degenerate form of a circle or an ellipse is a singular point.
Thus, the answer is parabola.