A complete treatise on practical land-surveying, in seven parts; (1839)
Nesbit, A[nthony], 1778-1859. [from old catalog] · London, Longman, Orme, Browne, Green, and Longmans; [etc., etc.] · leaf 24
Part I.) LAND-SURVEYING. 3 11. Angles are of three kinds; viz. right, acute, and obtuse. ] 2. A right angle is made by one right line standing perpen-dicularly upon another : thus, if D C be perpendicular to A B,the angles ADC and C D B are both right angles. C 1) B 13. An acute angle is less than… … 14. The complement of an angle is what it wants to completea right angle; as the angle D A B is the complement of theangle CAB. 15. An obtuse angle is greater than a right angle; as B C D. B D 16. The supplement of an angle is what it wants of two rightangles; as the angle A C B is the supplement…
Surveying
Internet Archive · Library of Congress · 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-56-31.webp)
