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 91
Fio. 199. A straight line joining A and J is equal to oneside of the required pentagon. With arcs of aradius equal to AJ set off on the circumference thepoints where the sides of the pentagon will ter-minate. To inscribe a regular polygon of any number ofsides, within a given circle. … Fig. 200. Draw two diameters AC and D7 within the givencircle. Fig. 200, at right angles to each other. ROGERS DRAWING AND DESIGN. 105 Divide the diameter D7 into as many equal partsas there are sides in the required polygon. Let itbe seven in this case, at the points 123456. Lengthen the diameter…
Mechanical drawing · Machine design
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