A textbook on mechanical and electrical engineering (1898)
International Correspondence Schools · Scranton : International Textbook Co., [1898-99] · leaf 299
e numberof degrees in arc A C = 22° 13^ X 2 = 44° 27, or the number oT degreesin the angle A O C. In the right triangle ADO, .^ side opposite AD 3.5 ,. . , , ■^O = —^ y,^ ^ = -.—. ^-, ^ = r.anc,n = 5 1^- nearly. Ans. sm A O D sm A O C . 70029 -^ Note.—The jirinciples explained in the two preceding… … GEOMETRY AND TRIGONOMETRY 289 REGULAR POLYGOXS. 140. A regular polygon may be divided into asmany equal isosceles triangles as there are sides, by drawinglines from the center to the angles. Each of the anglesformed at the center is equal to 360° divided by the numberof sides. To find the area of a…
Electrical engineering · Mechanical engineering
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
![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-189-107.webp)
