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 403
quantity B, the remaindersA and D are equal. Thus, it is proved for the angle at A ;it is also true for any other angle; for, since all other in-scribed angles on that side of the chord line HF equal theangle A {Art. 356), therefore the angle formed by a chordand tangent equals any angle in the… … be proved that the angle £i7i^ equals the angle FKH, theentire proposition is proved, for the angle FKH equals anyof all the inscribed angles that can be drawn on that side ofthe chord. {Art. 356.) To prove, then, that jE///^ equalsHKF\ the angle ^///^equals the sum of the angles A andB\ also the…
Carpentry · Architecture · Building
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