 | George D. Pettee - Geometry, Modern - 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... | |
 | Charles Edward White - Arithmetic - 1897 - 312 pages
...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... | |
 | George Albert Wentworth, George Anthony Hill - Arithmetic - 1897 - 476 pages
...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... | |
 | International Correspondence Schools - Mining engineering - 1900 - 728 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... | |
 | John Marvin Colaw, John Kelley Elkwood - Arithmetic - 1900 - 450 pages
...formed. Thus, the arc DE is the measure of the angle DCE. 337. In measuring angles, the circumference is divided into 360 equal parts, called degrees ; each degree into 60 parts, called minutes ; and each minute into 60 parts, called seconds. 1. The length of a degree varies.... | |
 | Charles Edward White - Arithmetic - 1901 - 472 pages
...circle terminating at the circumference is the * cime. Diameter. 203. 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. 204. An Angle is the difference... | |
 | 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... | |
 | 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 lines... | |
 | Joseph Ray - Arithmetic - 1857 - 340 pages
...in estimating latitude and longitude, and in measuring the motions of the heavenly bodies. A circle is divided into 360 equal parts, called degrees; each degree into 60 parts, called minutes; eqch minute into 60 parts, called seconds. TABLE. 60 seconds (") make 1 minute,... | |
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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. 
