A treatise on special or elementary geometry (1877)
Olney, Edward, 1827-1887, Olney, Edward, 1827-1887. Elements of trigonometry, plane and spherical · New York : Sheldon · leaf 442
hepolar triangle. Thus, let B, «i and A be the given parts.]^roject the triangle on the plane of c, as in the figure.Project B in the usual way, and make BC = the projec-tion of a. Through C draw DD, and make BDO = theprojection of A- Drawing the small circle with radiusPC, draw diameters through… … 90 SPHERICAL TRIGONOMETRY.
Geometry · Trigonometry
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