 Every circumference is regarded as being divided into 360 equal parts, called degrees. Each degree is divided into 60 equal parts, called minutes, and each minute into 60 seconds. These divisions are indicated by the marks ° ' ". Thus 28 degrees, 17...  Plane Trigonometry - Page 11by Levi Leonard Conant - 1909 - 183 pagesFull view - About this book
 | Robert Gibson - Surveying - 1811 - 580 pages
...or Equinoctial. The Equator, as well as all other great circles of the sphere, is divided into 360 equal parts, called degrees ; each degree is divided into 60 equal parts, called minutes i and the sexagesimal division is continued. NOTE. The ancients having no instruments by Which they... | |
 | Robert Gibson - Surveying - 1814 - 558 pages
...or Equinoctial. The Equator, as well as all other great circles of the sphere, is divided into 360 equal parts, called degrees ; each degree is divided into 60 equal parts, called minutes ,• and the sexagesimal division is continued. NOTE. The ancients having no instruments by Which they could... | |
 | Robert Gibson - Surveying - 1821 - 594 pages
...or Equinoctial. The Equator, as well as all other great circles of the sphere, is divided into 360 equal parts, called degrees ; each degree is divided into 60 equal parts, called minutes ; and the sexagesi• mal division*i3 continued. NOTE. The ancients having no instruments by which they could... | |
 | Frederick Emerson - Arithmetic - 1834 - 300 pages
...GEOGRAPHICAL MEASURE. The circumference of the globe — like every other circle — is divided in 360 equal parts, called degrees. Each degree is divided into 60 equal parts called miles, or minutes. Three miles are called a league. On the equator, 69^ statute miles are equal to... | |
 | B[enjamin] Franklin Callender - Measurement - 1836 - 226 pages
...MENSURATION OF ANGLES AND TRIANGLES. SECTION I. Definitions and ProblemS. Every circle is divided into 360 equal parts, called degrees ; each degree is divided into 60 equal parts, called minutes ; each minute is divided into 60 equal parts, called seconds; seconds are divided in the same manner,... | |
 | Benjamin Peirce - Geometry - 1837 - 216 pages
...be divided into 360 equal arcs called degrees, and marked thus (°). For instance, 60° is read 60 degrees. Each degree is divided into 60 equal parts called minutes, and marked thus ('). Each minute is divided into 60 equal parts called seconds, and marked thus ("). When... | |
 | John Lee Comstock - Astronomy - 1838 - 268 pages
...summer. OF LATITUDE AND LONGITUDE. Definitions. All circles surrounding the earth are divided into 360 equal parts called degrees ; each degree is divided...into 60 equal parts called minutes, and each minute into 60 parts called seconds. The signs by which these are indicated are 360° degrees, 60' minutes,... | |
 | Frederick Emerson - Arithmetic - 1839 - 300 pages
...GEOGRAPHICAL MEASURE. The circumference of the globe — like every other circle — is divided in 360 equal parts, called degrees. Each degree is divided into 60 equal parts called miles, or minutes. Three miles are called a league. On the equator, 69-g- statute miles are equal to... | |
 | Charles Davies - Geometrical drawing - 1840 - 262 pages
...circumference of a circle is used for the measurement of angles. For this purpose it is divided into 360 equal parts, called degrees, each degree is divided...into 60 equal parts called minutes, and each minute into 60 equal parts called seconds. The degrees, minutes, and seconds, are marked thus, °, ', " ;... | |
 | Augustus De Morgan - Algebra - 1840 - 182 pages
...the area of a circle from its radius, very nearly. Multiply the square of the radius by 3-1415927. * The right angle is divided into 90 equal parts called degrees, each degree into 60 equal parts called minutes, and each minute into 60 equal parts called seconds. Thus, 2° 15'... | |
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