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Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree....HistorycurveconecircleellipsehyperbolaparabolalineMenaechmusPlatoEudoxus of CnidusApollonius of PergatreatiseEccentricity of conic sectionsThe eccentricity of a conic section completely characterizes its shape. For example, all circles have zero eccentricity, and all parabolas have unit eccentricity; hence, all circles (and all parabolas) have the same shape, only varying in size. (Under appropriate magnification they are indistinguishable.) In contrast, ellipses and hyperbolas vary greatly in shape.eccentricityBritannica Quiz
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Christian Marinus Taisbak
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