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 21
: ^, determines P as lying on aline through the intersection ah. The position of P is there-fore determined uniquely by two distances, a and /3, or bytwo ratios a : /3, a : y, by which a third /? : y is implied. Ifthen we select three lines, a> h, c, not concurrent, the position 6 POINT AND LINE… … has to give P, would be identical (Fig. 3). Let the lengths ofthe sides of the triangle be denoted by a, b, c, and its area byA; and for detiniteness let the positive and negative sides of
Geometry, Analytic -- Plane
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