 | Astronomy - 1907 - 710 pages
...measuring arc is a part is divided into 360 equal parts, called degrees; each degree is subdivided into 60 equal parts, called minutes; and each minute into 60 equal parts, called seconds. The magnitude of an angle is then expressed by the number of degrees, minutes, and seconds... | |
 | William A. Radford - 1907 - 332 pages
...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,... | |
 | George E. Mercer - Arithmetic - 1909 - 312 pages
...B to C are arcs. The circumference of every circle is divided into 300 equal parts called degrees, each degree into 60 equal parts called minutes, and each minute into 60 equal parts called seconds. jJ5 of a circumference is called 1 degree of arc. J of a circumference, or 90 degrees, is... | |
 | 1912 - 558 pages
...degrees, ie, it is =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. f65\ {BO /OS F1 g - 6L Angular Measurement SOLIDS A solid has three dimensions—length, breadth,... | |
 | Eugene Randolph Smith - Geometry, Plane - 1909 - 204 pages
...numerical calculations, a perigon 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. 73. How many degrees are there in an interior angle of a regular polygon of 15 sides? of n-sides?... | |
 | William A. Radford, Alfred Sidney Johnson - Architecture - 1909 - 384 pages
...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,... | |
 | Eugene Randolph Smith - Geometry, Plane - 1909 - 424 pages
...How many sides has the polygon each of whose interior angles is six sevenths of a straight angle ? 60 equal parts called minutes, and each minute into 60 equal parts called seconds. 73. How many degrees are there in an interior angle of a regular polygon of 15 sides? of n-sides?... | |
 | Glenn Moody Hobbs - 1912 - 100 pages
...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".... | |
 | John William Hopkins, Patrick Healy Underwood - Arithmetic - 1912 - 406 pages
...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... | |
 | Claude Irwin Palmer, Charles Wilbur Leigh - Plane trigonometry - 1914 - 308 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 the... | |
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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. 
