 | Charles Davies - Surveying - 1839 - 376 pages
...accuracy. 41. 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 TRIGONOMETRY. V As the circumference of... | |
 | Jeremiah Day - Geometry - 1839 - 434 pages
...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 °,... | |
 | J. David Parkes - 1839 - 222 pages
...Aquarius, and X Pisces, which are called the twelve signs of the Zodiac. Each sign is divided into 30 equal parts, called degrees, each degree into 60 equal parts, called minutes, and each minute into 60 seconds, and so on to thirds, fourths, fifths, &c. Abréviations. — * Sextile;... | |
 | Augustus De Morgan - Algebra - 1840 - 182 pages
...radius, very nearly. Multiply the square of the radius by 3-1415927. * The right angle is divided into 90 equal parts called degrees, each degree into 60 equal parts called minutes, and each minute into 60 equal parts called seconds. Thus, 2° 15' 40" means 2 degrees, 15 minutes,... | |
 | 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, and decimal... | |
 | Charles Davies - Navigation - 1835 - 388 pages
...accuracy. 41. 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... | |
 | 1844 - 636 pages
...the circle in which the anifi- L cial globe turns, divided into 360 degree*. Every circle is supposed to be divided into 360 equal parts, called degrees, each degree into 60 equal parts, called minute*, \ each minute into 60 equal parts, called seconds, &c. ; a degree is therefore only a relative... | |
 | Enoch Lewis - Conic sections - 1844 - 234 pages
...its 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;...parts, called minutes; each minute into 60 equal parts, called seconds, &c. Degrees, minutes and seconds are designated thus, °, ', ". 11. As angles at the... | |
 | Joseph Emerson Worcester - Classical geography - 1844 - 356 pages
...pole ; and they are each 90 degrees from the equator. 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 secotuls. They are marked thus, 23° 88' 16"; ie 23 degrees,... | |
 | William Phillips - Mineralogy - 1844 - 832 pages
...angles is the number 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... | |
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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. 
