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 402
Fig. 265. 358-—Proposition.—The angle formed by a chord andtangent is equal to any inscribed angle in the opposite seg- … ment of the circle; that is, the angle D {Fig. 266) equals theangle A. Let HF be the chord, and E G the tangent; drawthe diameter JH\ then JHG is a right angle, also JFH \s 36o GEOMETRY. a right angle. {Art. 352.) The angles A and B together equala right angle {Art. 346); also the angles B and D…
Carpentry · Architecture · Building
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