 For the purpose of measuring angles, the circumference is divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes; each minute into 60 equal parts, called seconds.  School Arithmetic; Advanced Book - Page 217by John Marvin Colaw, John Kelley Elkwood - 1900 - 442 pagesFull view - About this book
 | Edward Laurence - Surveying - 1716 - 408 pages
...applied to a Circle. DEFINITIONS, i. Every C'rcle is fuppofed to be dividid into 560 D g. and each D¿g- into 60 parts, called Minutes, and each Minute into 60 parts, called Seconds, £5V. *ny Portion of the Circumference whereof is an Arch, and and is Meafured by the Number of Degrees... | |
 | William Taylor (teacher of the mathematics.) - Arithmetic - 1800 - 556 pages
...called a' femi-eircle • half the diameter is called the Radius. 8. The circumference of every 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, &c. Any part of... | |
 | Silvestre François Lacroix - Geometry, Analytic - 1826 - 190 pages
...given. 19. The custom has been to divide the entire circumference into 360 parts, called degrees, and each degree into 60 parts called minutes, and each minute into 60 parts, called seconds, and each second into 60 parts, called thirds, &c. The character used to denote -degrees is °, placed... | |
 | Thomas Kerigan - Nautical astronomy - 1828 - 776 pages
...hemisphere, and the other, the southern hemisphere. — The equator, like all other great circles, is divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes } each minute into 60 equal parts, called seconds, and so on. The Meridian,... | |
 | Jeremiah Joyce - Astronomy - 1828 - 262 pages
...the ecliptic is also divided into 12 signs, each sign must contain 30 degrees. Astronomers subdh»>de each degree into 60 parts, called minutes, and each minute into 60 seconds; thus, if I would express an angle of 25 degrees, 11 minutes, and 45 seconds, I should write... | |
 | William Smyth - Plane trigonometry - 1834 - 104 pages
...described with equal radii. ' 10. The entire circumference of every circle, whether great or small, is divided into 360 equal parts called degrees, each degree into 60 equal parts called minutes, each minute into 60 equal parts called seconds, each second into 60 equal... | |
 | Adrien Marie Legendre - Geometry - 1836 - 394 pages
...CIRCUMFERENCE. I. For the purposes of trigonometrical calculation, the cir cumference 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. The semicircumference,... | |
 | Charles Davies - Navigation - 1837 - 342 pages
...utmost 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. As the circumference... | |
 | Thomas Kerigan - Nautical astronomy - 1838 - 804 pages
...hemisphere, and the other, the southern hemisphere. — The equator, like all other great circles, is divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes ; each minute into , 60 equal parts, called seconds, and so on. The Meridian... | |
 | Charles Davies - Surveying - 1839 - 376 pages
...utmost 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... | |
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