wo fegments; and in Kke manner fubtending both theSegments. As in the annexed Diagram, the right line E C dividcththe circle B C D E into the two fegments CHE Sc E D C,and in like manner iiibtendeth both the fegments; that is,the right line E C is both the chord of the arch EHC, andalfo the chord… … 2 Trimnometria Britmmica. othe term of an arch is perpendicular to the Diameter, dividing the Semicircle into two fcg-ments, and in like manner referred to both. As in the preceding Diagram, the right line C F from the term of the arch at C, is perpen-dicular to the Diameter H AD, and divideth the…
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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-85-61.webp)
