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 76
aw the radius c b, make an angle bcdequal to thofe degrees, and draw the chord dbjthen will d b be the fide of the polygon required jwhich applied to the circumference from b to a,a to bt b to c kc. will give the points to which the fides of the polygonare to be drawn. If the polygon has an even… … 177. PROBLEM XXIV. On a given right line ab, to conjlrucl a regular polygon of any ajjignednumber ofjides. Operation, ift. Divide 360 degrees by thenumber of fides; fubtradr. the quotient from 180degrees, the remainder will be the degrees whichmeafure the angle made by any two adjoining fidesof…
Navigation · Nautical astronomy · Fortification
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