 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
 | Charles Davies, Adrien Marie Legendre - Geometry - 1885 - 538 pages
...angle. For convenience, the quadrant is divided into 90 equal parts, each of which is called a degree ; each degree into 60 equal parts, called minutes ;...and each minute into 60 equal parts, called seconds. Degrees, minutes, and seconds, are denoted by the symbols °, ', ". Thus, the expression 7° 22' 33",... | |
 | Geography - 1885 - 150 pages
...which means a half-sphere. 3. A small circle is one that divides the earth into two unequal parts. 4. Every circle is divided into 360 equal parts called degrees ; each degree is divided И" m' ... into GO equal parts called minutes; and each minute into 60 equal parts called... | |
 | Charles Davies - Geometry - 1886 - 346 pages
...Definitions. 28 The circumference of a circle is used for the measure. ment of angles. For this purpose it is divided into 360 equal parts called degrees, each...parts called minutes, and each minute into 60 equal pans called second s. The degrees, minutes, and seconds are marked thus ° ' " ; and 9° 18' 16", are... | |
 | William Findlay Shunk - Railroad engineering - 1886 - 378 pages
...inclndes one-quarter of the circle, and is the measure of a right angle. Each degree is further divided into 60 equal parts called minutes, and each minute into 60 equal parts called seconds. Degrees, minutes, and seconds are denoted by the symbols °, 1, ": thus the expression 7° 221 33"... | |
 | George Albert Wentworth - Arithmetic - 1886 - 392 pages
...by OA. The angle AOB is such a part of the angular magnitude about 0 as AB is of the circumference. The circumference of every circle is divided into 360 equal parts, called degrees, and corresponding to every one of these equal parts is an angle at the centre of the circle. Hence... | |
 | George Albert Wentworth, George Anthony Hill - Arithmetic - 1887 - 448 pages
...minutes = 1 degree (°). 90 degrees = 1 right angle. 360 degrees = 1 revolution. The circumference of a circle is divided into 360 equal parts, called degrees ; each degree into 60 minutes ; each minute into 60 seconds. The larger the circle, the greater the length of 1 degree. 1... | |
 | Nathaniel Bowditch - Nautical astronomy - 1888 - 704 pages
...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, Jtc. ; and an arc is said to be of as many degrees as it contains... | |
 | George Albert Wentworth - 1888 - 388 pages
...1700, 1734, 1800, 1818, 1880, 1900, 1924, 2000 are leap years? CIBCULAB AND ANOUI.AB MEASUBES. 302. The circumference of every circle is divided into...equal parts, called degrees ; each degree into 60 minutes, and each minute into 60 seconds. 60 seconds (") = 1 minute ('). 60* = I degree (°). 360°... | |
 | Nathan Fellowes Dupuis - Geometry - 1889 - 370 pages
...practical purposes the right angle is divided into 90 equal parts called degrees ; each degree is divided into 60 equal parts called minutes ; and each minute into 60 equal parts called seconds. 20 seconds and six-sevenths of a second, follows : — 51° 25' 42f . This is denoted as Theorem. —... | |
 | George Albert Wentworth - Arithmetic - 1889 - 674 pages
...by OA. The angle AOB is such a part of the angular magnitude about O as AB is of the circumference. The circumference of every circle is divided into 360 equal parts, called arc-degrees, and corresponding to every one of these equal parts is an angle at the centre of the circle.... | |
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