 | Eugene Randolph Smith - 1909 - 204 σελίδες
...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? 74.... | |
 | William A. Radford, Alfred Sidney Johnson - 1909 - 384 σελίδες
...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, one-fourth... | |
 | Eugene Randolph Smith - 1909 - 424 σελίδες
...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? 74.... | |
 | John William Hopkins, Patrick Healy Underwood - 1912 - 406 σελίδες
...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 a degree... | |
 | Glenn Moody Hobbs - 1912 - 100 σελίδες
...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". The relations... | |
 | Claude Irwin Palmer, Charles Wilbur Leigh - 1914 - 308 σελίδες
...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 terminal... | |
 | George E. Mercer, Mabel Bonsall - 1914 - 324 σελίδες
...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 called a... | |
 | Harmon Bay Niver - 1915 - 418 σελίδες
...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 into hemispheres.... | |
 | Nathaniel Bowditch - 1916 - 912 σελίδες
...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 , apply i... | |
 | 1916 - 1826 σελίδες
...MEASURE. (360 degrees = 1 revolution.) 1 degree = 1° = Ho 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 to divide... | |
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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. 
