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The American house carpenter: a treatise upon architecture, cornices and mouldings, framing, doors, windows and stairs. Together with the most important principles of practical geometry (1852)

Hatfield, R. G. (Robert Griffith), 1815-1879 · New York, J. Wiley · leaf 70

An illustration from The American house carpenter: a treatise upon architecture, cornices and mouldings, framing, doors, windows and stairs. Together with the most important principles of practical geometry, 1852, leaf 70
thoughtnot necessary to introduce in form. bFie. 95. 130.—Definition. If a straight line, as a 6, [Fig. 95,) stt.ndupon another straight line, as c d^ so that the two angles made at PRACTICAL GEOMETRY. 53 the point, 6, are equal—a b do a b d, (see note to Art. 27,) theneach of the two angles is… … 132.—Definition. The measure of an angle is the number ofdegrees contained between its two sides, using the angular pointas a centre upon which to describe the arc. Thus the arc, c e,{Fig. 96,) is the measure of the angle, c b e ; e a, of the angle,e b a ; and a d, of the angle, ab d.…

Carpentry · Architecture

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