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. An Elementary Geometry and Trigonometry - Page 11by William Frothingham Bradbury - 1873 - 238 pagesFull view - About this book
| Jedidiah Morse, Sidney Edwards Morse - Geography - 1826 - 342 pages
...divide the globe into two unequal parts. The two tropics and the two polar circles are less circles. **Every circle is divided into 360 equal parts, called degrees ; each degree** is divided into 60 minutes ; and each minute into 60 seconds. They are marked thus 32° 14' 26" ; that... | |
| Nathaniel Bowditch - Nautical astronomy - 1826 - 710 pages
...or small, are supposed to have their circumference divided into 360 equal parts, called degrees, and **each degree into 60 equal parts, called minutes ;...and each minute into 60 equal parts, called seconds,** and so on into thirds, fourths,* be. and an arch is said to be. of as many degrees as it contains parts... | |
| Thomas Keith - Navigation - 1826 - 508 pages
...the arc DE is the measure of the angle ABC. (H) 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. The angles are measured by the number of degrees cut... | |
| Nathaniel Bowditch - Nautical astronomy - 1826 - 782 pages
...small, are supposed to have th cumference divided into 360 equal parts, called degrees, and each deçr **60 equal parts, called minutes ; and each minute into 60 equal parts.** seconds, and so on into thirds, fourths,* be. and an arch is said to bi many degrees as it contains... | |
| Miles Bland - Geometry - 1827 - 458 pages
...angle (7.) Till lately. Geometers almost unanimously agreed to divide the circumference of the circle **into 360 equal parts called Degrees ; each degree...and each minute into 60 equal parts called Seconds,** &c. This method appeared to the Greek Geometers to afford some facilities for calculations, in consequence... | |
| Robert Simson - Trigonometry - 1827 - 513 pages
...II. The circumference of a circle is supposed to be divided into 360 equal parts called degrees, and **each degree into 60 equal parts called minutes, and each minute into 60 equal parts called seconds,** &c. And as many degrees, minutes, seconds, &c. as are contained in any arch, of so many degrees, minutes,... | |
| James Thomson - 1827 - 1014 pages
...circle be divided into 360 equal parts, each of them is called a degree. Each degree is subdivided **into 60 equal parts, called minutes; and each minute into 60 equal parts, called** * Geography is a description of the earth ; and is distinguished by different names, according to tha... | |
| James Ryan - Astronomy - 1827 - 408 pages
...is called an arc; and one-fourth, of the circumference of a circle is usually called a quadrant. 16. **The circumference of every circle is divided into 360 equal parts, called degrees** ; and of which the symbol is 12° or 7°, if 12 or 7 be their number. Each degree is also divided into... | |
| Adrien Marie Legendre - Geometry - 1828 - 346 pages
...For the purposes of trigonometrical calculations, the circumference of the circle is conceived to be **divided into 360 equal parts, called degrees ; each...and each minute into 60 equal parts, called seconds.** The semicircumference, or the measure of two right angles, contains 180 degrees; the quarter of the... | |
| Montgomery Robert Bartlett - Education - 1828 - 426 pages
...the circle inUlour equal parts called quadrants. The circumference of every circle, is supposed to be **divided into 360 equal parts, called degrees; each...and each minute into 60 equal parts, called seconds;** and these into thirds, &c. Now, as all circles are not of the same magnitude, and as they are all divided... | |
| |