 | John Hymers - Logarithms - 1841 - 244 pages
...certain angle fixed upon as the unit of angular measure. For this purpose we divide a right angle 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, seconds,... | |
 | Charles Davies - Navigation - 1835 - 388 pages
...For the purposes of trigonometrical calculations, the circumference of the circle is divided into 360 equal parts, called degrees; each degree into 60 equal parts, called minutes; and each minute into 60 equal parts, called seconds. PLANE TR16ONOMETRY. As the circumference of a... | |
 | Enoch Lewis - Conic sections - 1844 - 240 pages
...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; each minute into 60 equal parts, called seconds, &c, Degrees, minutes and seconds are designated thus, °, ', ". 11. As... | |
 | William Phillips - Mineralogy - 1844 - 832 pages
...of degrees, minutes, &,c. of which they consist. In measuring angles, the circle is divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes ; and each minute into 60 seconds : the divisions being thus designated : 360°, 60', GO". If one fourth... | |
 | Joseph Emerson Worcester - Classical geography - 1844 - 362 pages
...tropics, and the two polar circles. 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. " They are marked thus, 23° 28' 16"; ie 83... | |
 | Scottish school-book assoc - 1845 - 444 pages
...every minute of the quadrant. 3. In trigonometry all the angles round a point are divided into 360 equal parts, called degrees, each degree into 60 equal parts, called minutes, and each minute into "0 equal parts, called seconds. Degrees, minutes, and seconds, are respectively... | |
 | Ezra Otis Kendall - Astronomy - 1845 - 404 pages
...from all points in the circumference of that circle. Every circle is considered as divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds. They are marked 0 ' " — thus: 10° 2' 20"... | |
 | Charles Davies - Arithmetic - 1846 - 370 pages
...others. DIVISION OF THE CIRCLE MEASURE OF TIME. 40. 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. For astronomical purposes, the circumference of... | |
 | Anthony Nesbit - Plane trigonometry - 1847 - 492 pages
...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... | |
 | John Bonnycastle - Geometry - 1848 - 320 pages
...read in the middle. CD B *47. 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 so on. 48. The measure of any right-lined angle is an arc of a circle contained between the two... | |
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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. 
