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 196
ding as its measure is right, acute, or obtuse. Of course themagnitude of a solid angle is independent of the distances to whichthe edges may chance to be produced. Ills.—The opening between the two planes CABF and DABE is a Diedral(angle), AB is theEdge, and CABFand DABE are theFaces. Let MOlie in…
Geometry · Trigonometry
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