| Edward Brooks - Arithmetic - 1895 - 248 pages
...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 the arc BD... | |
| 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 measured by... | |
| 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 degree into 60 equal parts called minutes,** and each minute into CO equal parts called seconds. Since central angles vary as their intercepted... | |
| International Correspondence Schools - Mining engineering - 1900 - 730 pages
...circumference being at the vertex of the angle. For measuring angles, the circumference is divided into :i60 **equal parts. called degrees; each degree into 60 equal parts called minutes.** A quadrant is one-fourth the circumference of a circle, or 90°. The complement of an arc is 90° minus... | |
| Walter Nelson Bush, John Bernard Clarke - Geometry - 1905 - 378 pages
...theorem may be stated thus : A central angle is 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°... | |
| Sidney Luxton Loney - Hydrostatics - 1905 - 332 pages
...inconvenient unit of 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... | |
| Henry Sinclair Hall - 1908 - 286 pages
...which it is perpendicular to AB. (ii) All right angles are equal. A right angle is divided into 90 **equal parts called degrees (°) ; each degree into 60 equal parts called minutes (') ; each minute** into 60 equal parts called seconds ("). In the above figure, if OC revolves about O from the position... | |
| George E. Mercer - Arithmetic - 1909 - 312 pages
...circumference is an arc. A to B and 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.... | |
| Anthony Nesbit - Measurement - 1859 - 482 pages
...a circle, bounded \>y an arc and two radii. 47. 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. 48. The arc of a quadrant contains 90 degrees,... | |
| 1867 - 566 pages
...following pages. 8. Degrees &c. — AU circles, whether great or small, are supposed to be divided into 860 **equal parts, called degrees ; each degree into 60 equal parts, called minutes** ; and and each minute into 60 equal parts, called seconds, &c.* 9. An Angle is the inclination of two... | |
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