Rogers' drawing and design; an educational treatise relating to linear drawing; machine design; working drawings; transmission methods; steam, electrical and metal working machines and parts; lathes; boiler and parts; instruments and their use; tables, etc (1913)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 75
the given angle as described in Problem 2 by theline 3C. Bisect the angles 3CB and 3CA by thelines C4 and C5 and these lines divide the angleinto four equal angles as required. To trisect a right angle ; that is, to divide it intothree equal parts. Let ABC be a right angle, Fig. 168, that is,… … B Fig. 16S. 4 *^ With the same radius and with 4 as a center,describe an arc cutting the former at 2. From ias a center with the same radius, cut the arc at 3. Through the points 2 and 3 draw the lines 2Band 3B and they will divide the angle into threeequal parts as required. ROGERS DRAWING AND…
Mechanical drawing · Machine design
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