Linked from
The 16 pages that link to Parabola, each with the reason it gives.
Conic sectionBroader topic: A plane parallel to a cone’s sloping side produces a parabola.
Vertex (geometry)Broader topic: Its vertex is the point where the axis of symmetry meets the curve.
Focus (geometry)Broader topic: Its single focus works with a directrix rather than a second focus.
Parabolic reflectorBroader topic: A paraboloid is generated by rotating this curve around its axis.
ConeBroader topic: A plane parallel to a cone’s sloping side creates a parabolic section.