Books Books 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 11
by William Frothingham Bradbury - 1873 - 238 pages ## "Wentworth & Hill's Exercise Manual: Arithmetic, Volume 1

George Albert Wentworth - 1894 - 318 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... ## A Complete Arithmetic: With Oral and Written Exercises

George Washington Hull - Arithmetic - 1895 - 408 pages
...is a quadrant. An Arc is any part of a circumference. For convenience of measuring 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 TABLE. 60 seconds (") = 1 minute, '. 60 minutes = 1 degree,... ## The Normal Standard Arithmetic: By Analysis and Induction, Designed for ...

Edward Brooks - Arithmetic - 1895 - 426 pages
...the circumference is called a quadrant. 241. 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. 242. Any angle having its vertex at the centre is... ## The Normal Rudiments of Arithmetic: Oral and Written, Designed for Primary ...

Edward Brooks - Arithmetic - 1895 - 248 pages
...distant from a point within called the centre. 3. 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. 4. Any angle at the centre, as BCD, is measured by... ## Plane Geometry

George D. Pettee - Geometry, Plane - 1896 - 272 pages
....-.theirlimits=J 175. Sen. Both the circumference of a circle and the angular space about the centre are divided into 360 equal parts called degrees, each...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... ## A Practical Arithmetic

George Albert Wentworth - Arithmetic - 1896 - 490 pages
...by OA. The angle A OB 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 (arc-degrees), and corres.nding to every one of these equal parts is an angle at the centre of the... ## The Senior Arithmetic for Grammar Schools

Charles Edward White - Arithmetic - 1897 - 312 pages
...line through the centre of a circle terminating at the circumference is A circle. the Diameter. D 143. The circumference of every circle is divided into...360 equal parts called Degrees, each degree into 60 parts called Minutes, and each minute into 60 parts called Seconds. 144. An Angle is the difference... ## Exercises in Arithmetic

George Albert Wentworth, George Anthony Hill - Arithmetic - 1897 - 476 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... ## A Practical Arithmetic

George Albert Wentworth - Arithmetic - 1897 - 396 pages
...by OA. The angle A OB 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 degrees (arc-degrees), and corresponding to every one of these equal parts is an angle at the centre of the... 