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 25
nsidered asbeing of the same sign wlien /^, C, are on tlie same side ofthe line. The absolute values of two distances, q, r, determine tlieline as one of the four common tangents to two circleswhose centres are B, G, and whose ratlii are q, r: a com- 10 POINT AND LINE COORDINATES. parison of the… … Fifi. 5. But if we deal witli ratios of distances, the position oftlie line is determined by means of the points in whichit meets BC, CA, AB (the three fundamental points A, B, C,having been chosen non-collinear), just as when we aredealing with ratios of distances from a point P to…
Geometry, Analytic -- Plane
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