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" The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, &c. "
The First Six Books: Together with the Eleventh and Twelfth - Page 483
by Euclid - 1781 - 520 pages
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Radford's Cyclopedia of Construction: Carpentry, Building and ..., Volume 2

William A. Radford, Alfred Sidney Johnson - Architecture - 1909
...divided by mathematicians into 360 equal parts, called degrees ; each degree being again subdivided into 60 equal parts, called minutes, and each minute into 60 equal parts called seconds. Hence, it follows that the arc of a quarter circle or quadrant includes 90 degrees; that is,...
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Practical Mathematics: Instruction Paper, Volume 3

Glenn Moody Hobbs - 1912
...protractor, Fig. 14, showing degrees and fractions of degrees, is necessary. Each degree is divided into 60 equal parts called minutes, ', and each minute into 60 equal parts called seconds, ". Thus to represent an angle of 23 degrees, 47 minutes, and 9 seconds, write 23° 47' 9"....
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Hopkins and Underwood's Arithmetic: Book One-two, Book 2

John William Hopkins, Patrick Healy Underwood - Arithmetic - 1912
...units. The whole circumference is divided into 360 equal parts called degrees. Each degree is divided into 60 equal parts called minutes, and each minute into 60 equal parts called seconds. As one degree is ^^ of any circumference, a degree on one circle is not of the same size as...
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PLANE TRIGONOMETRY WITH TABLES

CLAUDE IRWIN PALMER - 1914
...turning. The right angle is divided into 90 equal parts called degrees (°), each degree is divided into 60 equal parts called minutes ('), and each minute into 60 equal parts called seconds ("). Starting from any position as initial side, it is evident that, for each position of the...
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Intermediate Arithmetic, Parts 2-3

George E. Mercer, Mabel Bonsall - Arithmetic - 1914
...circumference of every circle is divided into 360 equal parts called degrees, each degree into i50 equal parts called minutes, and each minute into 60 equal parts called seconds. 5J^ of a circumference is called 1 degree of arc. J of a circumference, or 90 degrees, is...
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Elementary Geography

Harmon Bay Niver - Geography - 1915 - 360 pages
...matter what size it may be, is divided into 360 equal parts called degrees. Each degree is divided into 60 equal parts called minutes, and each minute into 60 equal parts called seconds. The Equator and the meridian circles are called great circles, because they divide the earth...
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American Practical Navigator: An Epitome of Navigation and Nautical Astronomy

Nathaniel Bowditch - Nautical astronomy - 1916 - 836 pages
...to have their circumferences divided into 360 ecjual parts, called degrees; each degree is divided into 60 equal parts, called minutes; and each minute into 60 equal parts, called seconds; an arc is measured by the number of degrees, minutée, and seconds that it contains. . v ,...
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Mechanical Drawing: Instruction Paper, Part 2

Ervin Kenison - Mechanical drawing - 1916 - 71 pages
...ie, it is /A = i of a circumference. In order to obtain accurate measurements each degree is divided into 60 equal parts called minutes and each minute into 60 equal parts called seconds. /esi I8O Fig. 67. Angular Measurement SOLIDS A solid has three dimensions — length, breadth,...
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1. Mathematical Tables

Edward Vermilye Huntington, Louis Albert Fischer - Engineering - 1916 - 186 pages
...(360 degrees = 1 revolution.) 1 degree = 1° = Ую of a right angle. The degree is usually divided into 60 equal parts called minutes ('), and each minute into 60 equal parts called seconds ("); while the second is subdivided decimally. But for many purposes it is more convenient...
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Plane and Spherical Trigonometry

Claude Irwin Palmer, Charles Wilbur Leigh - Logarithms - 1916 - 188 pages
...turning. The right angle is divided into 90 equal parts called degrees (°), each degree is divided into 60 equal parts called minutes ('), and each minute into 60 equal parts called seconds (")• Starting from any position as initial side, it is evident that, for each position of...
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