Conic section

Definition and stakes

1911 Encyclopædia Britannica, Volume 6… (1911)

“ The definition of conics as sections of a cone was employed by the Greek geometers as the fundamental principle of their researches in this subject; but the subsequent development of geometrical methods has brought to light many other means for defining these curves. One definition, which is of especial value in the geometrical treatment of the conic sections (ellipse, parabola and hyperbola) in plano, is that a conic is the locus of a point whose distances from a fixed point (termed the focus) and a fixed line (the directrix) are in constant ratio. ”
Source: Wikisource

Portrait of Plutarch Plutarch,  Selected Essays of Plutarch, Vol…

“ We are tempted to ask whether, if Greeks had not settled these problems, xivwhich men of no other ancient race attacked scientifically, they would have been settled to this day. To come down to a humbler matter: if the properties of the conic sections had not been discovered by Apollonius and his predecessors, would they stand in their place, probably a modest one, on a modern syllabus, and, meanwhile, could the mechanical arts have progressed without them? ”
Source: Gutenberg

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