Sullivan, Christine [Gordon]. [from old catalog] · New York, Cincinnati [etc.] American book company · leaf 24
hexagon. Describe a circle. With the radius of the cir-cle as a chord, lay off on the circumference thepoints A^ B, C, D, E, F (Fig. 27). Connect thesepoints by straight lines, which construction givesthe required hexagon. Fig. 27. GEOMETRIC PROBLEMS. 19 Problem 8. — To bisect any an Let ABC (Fig.… … Fig. 28.
Mechanical drawing
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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-349-240.webp)
