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 92
31. To inscribe a pentagon ina circle (Fig. 31). •— Draw diam-eters A C, B D at right angles, cut-ting at o. Bisect A o at E, and fromE, with radius E B, cut A C at F;from B, with radius B F, cut thecircumference at G, H, and with thesame radius step round the circle to/ and K; join the points so… … 32. To construct a pentagonon a given line A B (Fig. 32).—From B erect a perpendicular B Chalf the length of i 5; join A C and.prolong it to D, making C D = B C.Then B D is the radius of the circlecircumscribing the pentagon. FromA and B as centres, with B D asradius, draw arcs cutting each otherin…
Mechanical engineering
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![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-44-24.webp)
