 | Jeremiah Day - 1838 - 416 σελίδες
...measuring the latter, a circle is introduced. The periphery of every circle, whether great or small, is supposed to be divided into 360 equal parts called degrees, each degree into 60 minutes, each minute into 60 seconds, each second into 60 thirds, &c., marked with the characters... | |
 | Thomas Holliday - 1838 - 404 σελίδες
...fig. 16, A—C. 4. The diameter is the greatest straight line in a circle. 5. The circumference of a circle is supposed to be divided into 360 equal parts called degrees. The face of the theodolite, compass, circumferentor, and protractor, are of the same figure as the... | |
 | Thomas Keith - 1839 - 498 σελίδες
...measure of the angle aBc, and the arc DE is the measure of the angle ABC. (56) The circumference of every circle is supposed to be divided into 360 equal parts called degrees, each degree into 60 equal parts called minutes, each minute into 60 equal parts called seconds. The angles are... | |
 | Jeremiah Day - 1839 - 434 σελίδες
...measuring the latter, a circle is introduced. The periphery of every circle, whether great or small, is supposed to be divided into 360 equal parts called degrees, each degree into 60 minutes, each minute into 60 seconds, each second into 60 thirds, &c., marked with the characters... | |
 | Benjamin Greenleaf - 1839 - 356 σελίδες
...contained by the lines B, A and A, D is called the angle B, A, D, or D, A, B. 56. The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 minutes, each minute into 60 seconds ; and so on. Hence a semicircle contains... | |
 | W. F. Walker - 1841 - 246 σελίδες
...C. 0 1— 60. g. 1 = 60 = 3600. C. 1 = 30 = 1800 = 108000. 1 = 12 — 360 = 21600 = 1296000. . This measure is used in estimating latitude and longitude,...also in measuring the motions of the heavenly bodies. XIII. TIME. The denominations of Time are the year, the month, the week, the day, the hour, the minute,... | |
 | Benjamin Greenleaf - 1841 - 334 σελίδες
...contained by the lines B, A and A, D is called the angle B, A, D, or D, A, B. 56. The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 minutes, each minute into 60 seconds ; and so on. Hence u semicircle contains... | |
 | Charles Guilford Burnham - 1841 - 324 σελίδες
...centre ; and it divides the circle into two equal parts, called semi-circles. 14. The circumference of every circle is supposed to be divided into 360 equal parts, called degrees; and each degree into 0O equal parts, called minutes; and each minute into 60 equal parts, called seconds;... | |
 | William Grier - 1842 - 320 σελίδες
...AO that which stands at the angular point is read in the middle. Thus, DAE. 57. The circumference of every circle is supposed to be divided into 360 equal parts, called degrees; and each degree into 60 minutes, each minute into 60 seconds, and so on. Hence a semicircle contains... | |
 | Joseph Gwilt - 1842 - 1114 σελίδες
...abstract relations which connect it with geodisic operations. 1 034. We have already observed that every circle is supposed to be divided into 360 equal parts, called degrees, and that each degree is subdivided into 60 minutes, these minutes each into 6O seconds, and so on.... | |
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The circumference of every circle is supposed to be divided into 360 equal parts, called degrees... 
