The mechanical engineer's pocket-book. A reference-book of rules, tables, data, and formulæ, for the use of engineers, mechanics, and students (1910)
Kent, William, 1851-1918 · New York, J. Wiley & sons · leaf 94
the octagon. 40. To describe a polygon ofany number of sides upon a givenstraight line (Fig. 40).—Producethe given line A B, and on A, with theradius A B, describe a semicircle;divide the semi-circumference intoas many equal parts as there are tobe sides in the polygon — say, inthis example, five… … 41. To inscribe a circle withina polygon (Figs. 41, 42). — Whenthe polygon has an even number ofsides (Fig. 41), bisect two oppositesides at A and B; draw A B, andbisect it at C by a diagonal D E, andwith the radius C A describe thecircle. When the number of sides is odd(Fig. 42), bisect two of the…
Mechanical engineering
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