Davies, Charles, 1798-1876 · New York and Chicago, A. S. Barnes and company · leaf 64
BOOK II fi3 Problems. angle B is equal to the angle E: hence, ABCD is the re-quired rhombus. PROBLEM xv.To find the centre of a circle Draw any chord, as AB, and bisect itby Problem IV. Then, through F, themiddle point, draw DCE, perpendicularto AB, by Problem VI. Then DCEwill be a diameter of the… … PROBLEM XVI. To describe the circumference of a circle through three givenpoints not in the same straight line. Let Ay B, C, be the given points. Join these points by the straightlines AC AB, BC. Then, bisect any two of thesestraight lines, as AB, BC, by theperpendiculars OD, OP (Prob. iv);and the…
Geometry · Plane trigonometry
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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-193-113.webp)
