Legendre, A. M. (Adrien Marie), 1752-1833, Brewster, David, Sir, 1781-1868, Davies, Charles, 1798-1876 · New York, Wiley & Long · leaf 182
PROPOSITION XIV. THEOREM. The solidity of a sphere is equal to Us surface multiplied by «third of its radius. a … 182 GEOMETRY. Inscribe in the semicircle ABCDE aregular semi-polygon, having any numberof sides, and let 01 be the radius of thecircle inscribed in the polygon. If the semicircle and semi-polygon berevolved about EA, the semicircle willdescribe a sphere, and the semi-polygon asolid which has for…
Trigonometry · Geometry
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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-59-35.webp)
