American practical navigator: an epitome of navigation and nautical astronomy (1914)
Bowditch, Nathaniel, 1773-1838, United States. Navy Dept. Bureau of Equipment, Logan, George Wood, 1868-1915 · Washington, Govt. Print. Off. · leaf 277
gth being twice thatof the radius. A diameter divides the circle and its circumference into twoequal parts. An arc of a circle is any portion of the circumference, as DFE.The chord of an arc is a straight line joining the ends of the arc. It dividesthe circle into two unequal parts, called… … RULES AND PRINCIPLES OF MATHEMATICS. 269 Any part of a circle contained between two radii and an arc is called a sector, as GCH. A quadrant is half a semicircle, or one-fourth part of a whole circle, as CAG. All circles are supposed to have their circumferences divided into 3()0 ecjual parts,…
Navigation · Nautical astronomy
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