A d, h e, andg f parallel and equal to b c; join fe, also/Dand e e ; and the prism is constructed as proposed. Here note that all the four foregoing solids maybe constructed by first forming their bases, andraising perpendiculars from each angle, andhaving determined the altitude, join the points… … A Diagonal, from the Greek dis, twice, or double,and gonia, an angle, that is, meaning a line drawnthrough two opposite angles. Now draw the diagonals A c and B D, crossingin 0, the centre of the base. The altitude or heightof a pyramid is laid off on a line perpendicular to !the base. I Draw \x…
Design · Decoration and ornament · Art
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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-273-178.webp)
