 | 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,... | |
 | Charles Davies - Navigation - 1841 - 414 pages
...purposes of trigonometrical calculations, the circumference of the circle is divided into 360 eqnal parts, called degrees ; each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds. As the circumference of a circle may be regarded 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 degrees,... | |
 | 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,... | |
 | Scottish school-book assoc - 1845 - 444 pages
...lines meeting in it, are together equal to two right angles. SCHOLIUM. For the purposes of calculation, the circumference of every circle is supposed to be divided into 300 equal parts, called degrees, and each degree is supposed to be divided into 60 equal parts, called minutes, and each minute into... | |
 | 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" — which... | |
 | 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 the... | |
 | 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 drawn... | |
 | 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 lines... | |
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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. 
