Higher geometry; an introduction to advanced methods in analytic geometry (1922)
Woods, Frederick S. (Frederick Shenstone), 1864- · Boston, New York, Ginn and Company · leaf 48
AND LIKE COORDINATES IN A PLANE 35 The trilinear coordinates contain, the Cartesian coordinates as aspecial limiting case, in which the line BG is the line at infinity. IfBC recedes indefinitely from A, p3 becomes infinite, but the factorkz can be made to approach zero in such a way that IAm kaps =… … Fig. 9 coordinates x: y: t of § 18.23. Points on a line. If yx-y^y3 and wsb are two fixed points, the coordinates of any point on the straight line joining them are yt+ Xz1: y2 + \z : y + \z, and any point with these coordinates lies on that line. To prove this let Y and Z (Fig. 9) be the two fixed…
Geometry, Analytic
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