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 94
cribed circles.For sa : sa : : ab : ah. (256)And ab, ab, arc like parts of the perimeters of their polygons.Therefore sa : sa ; : perim, abcdef : perim, abedef. (234) 261. GEOMETRY. n 26r. THEOREM XXX. If there he two regular and like polygons■, the one in-ferbed in> and the other circumfcribing… … Dem. It is evident at fight, that the circumfcribing hexagon fchiklis lefs than the circumfcribing fquare abed. And alfo that the inferibed hexagon fghikl is greater than the in*fcribed fquare abed. And in both cafes* the difference between the hexagon and the circle,is lefs than the difference…
Navigation · Nautical astronomy · Fortification
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