The American house carpenter. A treatise on the art of building. Comprising styles of architecture, strength of materials, and the theory and practice of the construction of floors, framed girders, roof trusses, rolled-iron beams, tubular-iron girders, cast-iron girders, stairs, doors, windows, mouldings, and cornices; together with a compend of mathematics. A manual for the practical use of architects, carpenters, stair-builders, and others (1880)
Hatfield, R. G. (Robert Griffith), 1815-1879, Hatfield, O. P., ed · New York, J. Wiley & sons · leaf 555
two trian-gles BDE and BA C are homologous; consequently their 512 TRIGOXOiMETRY. corresponding sides are in proportion (Art. 361). Hence, ifd equals unity, we have— d : / : : a : c, = ^/, from which, when a and / are known, c is obtained by sim-ple multiplication. 4-74.— Riglit-Angeled Triangles:… … FiCx. 314. tables, termed Trigonometrical Tables. The lines d, e, and/, are known as siucs, cosiuts, tangents, cotangents, etc., asshown in Fig. 315—where A B is the radius of the circleB CH. Draw a line A F, from A, through any point, C, of thearc B G. From C draw CD perpendicular to A B ; from…
Carpentry · Architecture · Building
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
