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 37
andap be a, and similarly let b\ c be determined. Let the joinof bo and be be a, and similarly for b, c; then a, b, care concurrent, and the point they determine is I ^, r (Fi^--9)- r 9 i<^ ^ ^ The points ap, bp, cp have ecjuations 9 f /i / / 9 hence 6 is the join of ,] = {) and f-f.= 0. 22… … Fl<i. !».
Geometry, Analytic -- Plane
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