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" The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds. "
A Treatise of Plane and Spherical Trigonometry: In Theory and Practice ... - Page ix
by Francis Nichols - 1811 - 128 pages
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Mathematics for Practical Men: Being a Common-place Book of Principles ...

Olinthus Gregory - 1863 - 482 pages
...(See the next figure.) 3. The circumference of a circle is supposed to be divided or to be divisible into. 360 equal parts, called degrees; each degree into 60 equal parts, called minutes; each of these into 60 equal parts, called seconds ; and so on to the minutest possible subdivisions. Of...
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Primary Elements of Plane and Solid Geometry: For Schools and Academies

Evan Wilhelm Evans - Geometry - 1862 - 116 pages
...are may be taken as the measure of its subtended angle. To this end the circumference is conceived to be divided into 360 equal parts, called degrees, each degree into 60 minutes, and each minute into 60 seconds. Then whatever number of degrees, etc., an arc contains, the...
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A practical treatise on ... land and engineering surveying, Volume 34

Henry S. Merrett - 1863 - 476 pages
...point, but by certain lines described about that arc. The circumference of every circle is supposed to be divided into 360 equal parts, called degrees; each degree into 60 minutes ; each minute into 60 seconds ; and so on. The sine of three angles of every triangle, or two...
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A Practical Treatise on the Science of Land and Engineering Surveying ...

Henry S. Merrett - 1863 - 428 pages
...point, but by certain lines described about that arc. The circumference of every circle is supposed to be divided into 360 equal parts, called degrees; each degree into 60 minutes ; each minute into 60 seconds ; and so on. The sine of three angles of every triangle, or two...
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Elements of Plane Trigonometry: And Their Application to the Measurement of ...

William Frothingham Bradbury - Plane trigonometry - 1864 - 324 pages
...from a point within, called the centre ; as ABD E. The circumference of every circle is supposed to be divided into 360 equal parts, called degrees (), each Degree into 60 equal parts, called minutes ('), and each minute into 60 equal parts, called seconds ( "). 34. The RADIUS of a circle is a line...
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A Written Arithmetic, for Common and Higher Schools: To which is Adapted a ...

George Augustus Walton - Arithmetic - 1864 - 376 pages
...centre, to an opposite foiat, is called a Diameter. 188. The circumference of any circle is supposed to be divided into 360 equal parts, called Degrees, each degree into 60 Minutes, and each minute into 60 Seconds. TABLE. marked '. u о 60 seconds (") = 1 minute, 60' =1 degree,...
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A Written Arithmetic, for Common and Higher Schools: To which is Adapted a ...

George Augustus Walton - Arithmetic - 1864 - 364 pages
...centre, to an opposite point, is called a Diameter. 188. The circumference of any circle is supposed to be divided into 360 equal parts, called Degrees, each degree into 60 Minutes, and each minute into 60 Seconds. TABLE. 60 seconds (") = 1 minute, marked '. 60' =1 degree,...
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Elements of Geometry and Trigonometry

C. Davies - 1867 - 342 pages
...GEOMETRYDefinitions 28 The circumference of a circle is used for the measurement of angles- For this purpose it is divided into 360 equal parts called degrees, each degree into 60 equal parts called ninutes, and each minute into 60 equal parts called secondsThe degrees, minutes, and seconds are marked...
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Smith's Illustrated Astronomy: Designed for the Use of the Public Or Common ...

Asa Smith - 1868 - 84 pages
...— The boundary of a circle. The circumference of every circle в supposed to be divided into and equal parts, called degrees ; each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds. Circumpolar Start.— Those stars which revolve...
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Elements of Geometry and Trigonometry: With Practical Applications

Benjamin Greenleaf - 1869 - 516 pages
...fixed upon as the unit of angular measure. For this purpose a right angle is generally divided into 90 equal parts called degrees, each degree into 60 equal parts called minutes, each minute into 60 equal parts called seconds ; then an angle is expressed by the number of degrees, minutes, seconds,...
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