An introductory account of certain modern ideas and methods in plane analytical geometry (1894)
Scott, Charlotte Angas, b. 1858 · London, New York : Macmillan and Co. · leaf 94
^intersecting (Fig. 25 (a)). The three sets are characterizedby having imaginaiy tangents from A, B, G; that is, by being-met in imaginary points by BG, GA, AB, respectively. … Fio. 25. For a range with imaginary tangents, the real conies fallinto two sets, no one of a set visibly intersecting any otlier ofthat set, but any one of a set visibly intersecting any one ofthe other set (Fig. 25 (6)). The two sets are characteriztMl byhaving imaginary tangents from G, B; that…
Geometry, Analytic -- Plane
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