The normal elementary geometry : embracing a brief treatise on mensuration and trigonometry : designed for academies, seminaries, high schools, normal schools, and advanced classes in common schools (1884)
Brooks, Edward, 1831-1912 · Philadelphia : Christopher Sower Co. · leaf 126
luding a triedral of the other. Let the three faces of the triedral angles A and L of theprisms ABODE—F and LMNOP—§ be equal and similarlyplaced; then will the prisms beequal. For, place the base ABODE on its equal LMNOP; then, since the triedral angles A and L are equal (B. V. Th. XIV.), they will… … 122 GEOMETRY. the upper base of the other prism; hence also the planes oftheir bases will coincide, and, since these bases are equal, theywill coincide throughout; consequently, all the lateral facesof the two prisms will coincide, each to each, and the prismswill coincide throughout, and are…
Geometry · Plane trigonometry
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