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 276
Fig. 300. … Fig. 391. 258 EXERCISES IN GEOMETRICAL XNVENTION. cka + akh =■ cah. Hence, the vertices a and a are in the same circumference.In like manner we show that ft and y are in the circumference passing througha, h, and c. 2d. Considering one of the partial triangles as BHC, a, /?, and y are the feet…
Geometry · Trigonometry
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