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 244
582, Symmetmcal Spherical Triangles are such ashave the parts (sides and angles) of the one respectively equal to theparts of the other, but arranged in a dijfferent order, so that the tri-angles are not capable of superposition. OF SPHERICAL TRIANGLES. 223 … Fia. :WJ. III.—In Fig. 333, ABC and ABC represent sj-mmetiical spherical tri-angles. In these triangles A = A, B = B, C = C,AC = AC^ AB = AB, and BC = BC; neverthe-less we cannot conceive one triangle superimposedupon the other. Thus, were we to make the at-tempt by placing AB in its equal AB, A at…
Geometry · Trigonometry
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
