Legendre, A. M. (Adrien Marie), 1752-1833, Brewster, David, Sir, 1781-1868, Davies, Charles, 1798-1876 · New York, Wiley & Long · leaf 130
lane,may be found by marking uponthat plane three points B, C, D, equally distant from the pomt A,and then finding the centre of the circle which passes throughthese points ; this centre will be P, the point sought. Scholium. The angle ABP is called the inclination of theoblique line AB to the… … PROPOSITION VI. THEOREM. If from a point without a plane, a perpendicular he let fall on theplane, and from the foot of the j)erpendicular a perpendicularbe drawn to any line of the plane, and from the point of inter-section a line be drawn to the first point, this latter line will hepeiyendicular…
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-390-270.webp)
