 | Euclides - 1860 - 288 pàgines
...a circle is accordingly supposed to be divided into 360 equal parts, called degrees ; each of these into 60 equal parts, called minutes ; each of these into 60 equal parts, called seconds ; and so on. If, therefore, a circle be described from the angular point as a centre, the number of degrees, minutes,... | |
 | Josiah Lyman - 1862 - 92 pàgines
...fourth part of a circle; as AFB, Fig. 1. 8. 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, &c. 9. The Measure of an angle is the arc intercepted... | |
 | Benjamin Greenleaf - 1861 - 638 pàgines
...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 culled seconds ; then an angle is expressed by the number of degrees, minutes,... | |
 | Benjamin Greenleaf - 1862 - 518 pàgines
...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,... | |
 | William Frothingham Bradbury - 1864 - 324 pàgines
...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... | |
 | C. Davies - 1867 - 342 pàgines
...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... | |
 | Asa Smith - 1868 - 86 pàgines
...— 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... | |
 | Benjamin Greenleaf - 1869 - 516 pàgines
...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,... | |
 | Anthony Nesbit - 1870 - 578 pàgines
...point within it, called the centre. 39. 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. 40. The diameter of a circle is a right line... | |
 | Enoch Lewis - 1872 - 238 pàgines
...supplement. Thus BHD is the supplement of AB. 10. The circumference of every circle is supposed to be divided into 360 equal parts, called degrees; each degree into 60 equal parts, called minutes; eafth minute into 60 equal parts, called seconds, &c. Degrees, minutes and seconds are designated thus,... | |
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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. 
