Davies, Charles, 1798-1876 · New York, Cincinnati [etc.] American book company · leaf 190
ETRICALLY. i With the three given sides constructthe triangle ABC. Then, at A lay offthe angle BAD z=z 22° 30, and at B theangle ABD = 33° 45, and note D, thepoint at which the two lines intersect. Through the points A, D, and B, de-scribe the circumference of a circle, andthrough G and D draw the… … Fig. 102. (PA = 710.198 yards.Ans. \PG — 1042.524 PB= 934.289 Note.—This problem is much used in maritime surveying,for the purpose of locating buoys and sounding-boats. Thetrigonometrical solution is somewhat tedious, but the geomet-rical solution is very easy, as shown above. 184 ELEMENTS OF…
Surveying
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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-185-101.webp)
