Linked from
The 44 pages that link to Conic section, each with the reason it gives.
Projective geometryRelated: Conics were central objects in the subject's early development.
Two-body problemRelated: These are the possible shapes of Newtonian inverse-square orbits.
Polar coordinate systemRelated: Conics with a focus at the origin have compact polar equations.
Jakob SteinerRelated: Conics were central objects in the projective geometry Steiner developed.
Anthemius of TrallesRelated: Anthemius wrote mathematical work on conic sections.
Ibn SahlRelated: Conic geometry supplied shapes for mirrors and lenses that focus light.