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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