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 209
l, that is, ab = AB, be = BC,cd = CD, etc., since they are parallels included betweenparallels (242). Again, the corresponding angles ofthese polygons are equal, that is, a = A, 6 = B, c = C,etc., since their sides are parallel and lie in the samedirection {416). Therefore the polygons ABCDE,… … Fig. 289. PROPOSITION IL 466» Theorem,—If three faces including any triedral of oneprism are equal respectively to three faces including a triedral of theother, and similarly placed, the prisms are equal, Dem.—In the prisms AfZ, and kd,let ABCDE equal ABCDE, fKBba =ABba, and BCcb = BCcb; then…
Geometry · Trigonometry
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