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 283
Fifi. 404. THEOEEMS IN SPECIAL GEOMETRY. 265 730. Any regular polyedron is iuscriptible and circumscriptibleby a sphere. Sugs.—From the centres of any two adjacent faces, as c and c, let fall per-jjendiculars upon the common edge, and they will meet it intlie same point o (V). The plane of these…
Geometry · Trigonometry
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