A treatise on surveying and navigation: uniting the theoretical, practical, and educational features of these subjects (1857)
Robinson, Horatio N[elson], 1806-1867. [from old catalog] · Cincinnati, J. Ernst; Toledo, Anderson, Burr, & co. · leaf 16
SO, and it will be the per-pendicular required. Proof, (th. 15, b. 1, cor. )• The following is another method, whichis preferable, when the given point, 0, is ator near the end of the line. Take any point, 0, which is manifestlyone side of the perpendicular, and join 00;and with 00, as a radius,… … PROBLEM 4. From a given point loithout a line, to draw a perpendicular to that Let AB be the given line, and 0 thegiven point. From C, draw any obliqueline, as On. Find the middle point ofOn by (problem 1), and from that point,as a center, describe a semicircle, havingOn as a diameter. From the…
Surveying · Navigation
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