The elements of navigation : containing the theory and practice, with all the necessary tables, to which is added, a treatise of marine fortification ... (1754)
Robertson, J. (John), 1712-1776, Adams, Charles Francis, 1807-1886, former owner. BRL, Adams, John, 1735-1826, former owner. BRL, Boston Public Library) John Adams Library BRL · London : Printed for J. Nourse ... · leaf 81
greafejl fide (abJ. Dem. In the greated fide ab, take ad ==. AC, draw cp, and thro b draw be parallel to cd. Then the angles adc, acd, are equal. And 4 adc —L^ ABE. Therefore Z. acd —£_ ABE. That is, a part of the angle acb is greater than the angle abg, Consequently the £_ c is greater than the l_… … 197. THEOREM XL Parallelograms (ad, de, eh) jlanding on tfefame hafe (cd), oron equal hafes (cd, Gh), and be-,txueen the lame parallels, (ch, af), are eq\ial. ~D G H Dem. The triangles ace, bdf, are congruous. (90 ForAc=Bp, ce —df (119); and ae=(ab-{-be =) bf(=e-f-j-be).Now if from each of the…
Navigation · Nautical astronomy · Fortification
Internet Archive · Boston Public Library · Public Domain Mark 1.0. Free to use for anything.
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