| N. F. DUPUIS, M.A., F.R.S.C. - 1894
...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 42°. Theorem... | |
| George D. Pettee - 1896 - 253 sider
...of a circle and the angular space about the centre are divided into 360 equal parts called degrees, **each degree into 60 equal parts called minutes, and each minute into** CO equal parts called seconds. Since central angles vary as their intercepted arcs, any central angle... | |
| American School (Lansing, Ill.), Carl Stephen Dow - 1902
...degrees is measured by ^ of the circumference. 185. For accurate measurement each degree is divided **into 60 equal parts called minutes and each minute into 60 equal parts** ('ailed seconds. The symbols of degrees, minutes and seconds are °, ', ", respectively. To express... | |
| American School (Lansing, Ill.), Frank Wakeley Gunsaulus - 1903
...degrees is measured by ^ of the circumference. 185. For accurate measurement each degree is divided **into 60 equal parts called minutes and each minute into 60 equal parts called seconds.** The symbols of degrees, minutes and seconds are °, ', ", respectively. To express 23 degrees, 47 minutes... | |
| Walter Nelson Bush, John Bernard Clarke - 1905 - 355 sider
...measured by its intercepted arc. The circumference 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.** For brevity, an angle measured by an arc of 1° is called an angle of 1° ; etc. NOTE. — This division... | |
| John Marvin Colaw, Frank Williamson Duke - 1906 - 400 sider
...passing around the earth on its surface ? 444. In measuring circumferences, each degree is divided in **60 equal parts, called minutes, and each minute into 60 equal parts, called seconds.** In this measure, degrees, minutes, and seconds are written with symbols. Thus, 3 degrees, 25 minutes,... | |
| Sidney Luxton Loney - 1907 - 290 sider
...measurement on account of its size. We therefore subdivide a right angle into 90 equal parts called degrees, **each degree into 60 equal parts called minutes, and each minute into 60 equal parts called seconds.** The symbols used for a degree, a minute, and a second are 1°, 1', and 1". Thus 10° 11' 12" means... | |
| William A. Radford - 1907
...divided by mathematicians into 360 equal parts, called degrees ; each degree being again subdivided **into 60 equal parts, called minutes, and each minute into 60 equal parts called seconds.** Hence, it follows that the arc of a quarter circle or quadrant includes 90 degrees; that is, one-fourth... | |
| International Correspondence Schools, International Textbook Company - 1907
...measuring arc is a part is divided into 360 equal parts, called degrees; each degree is subdivided **into 60 equal parts, called minutes; and each minute into 60 equal parts, called seconds.** The magnitude of an angle is then expressed by the number of degrees, minutes, and seconds that its... | |
| George E. Mercer - 1909
...B to C are arcs. The circumference of every circle is divided into 300 equal parts called degrees, **each degree into 60 equal parts called minutes, and each minute into 60 equal parts called seconds.** jJ5 of a circumference is called 1 degree of arc. J of a circumference, or 90 degrees, is called a... | |
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