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 422
in the diameterpassing through that point, equal to the projectionof the given side. (This is done by taking Hd =Nd = b, as in Prob. 1, and drawing del). Now,with P as a centre, and radius PO, describe a cir-cumference cutting BOB. One extremity of thegiven side h will be projected in this… … cnuse, belong to a treatise on Conic Sections. In this case, BB and 20 P are the axes of theellipse, and the curve can be constructed by takin<? BP as a radius, and strikinor arcs from 0as a centre, cutting BB- These intersections are the foci of the required ellipse. Then takea string equal in…
Geometry · Trigonometry
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