 | 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
...surface as those of summer. OF LATITUDE AND LONGITUDE. Definitions. All circles surrounding the earth are divided into 360 equal parts called degrees ; each...equal parts called minutes, and each minute into 60 parts called seconds. The signs by which these are indicated are 360° degrees, 60' minutes, and 30"... | |
 | Thomas Kerigan - Nautical astronomy - 1838 - 804 pages
...firmament. — The equator, or equinoctial, as well as all the other great circles of the spheres, is divided into 360 equal parts, called degrees ; each degree is divided into GO equal parts, called minutes, and each minute into 60 equal parts, called seconds. ,57 The Meridian... | |
 | Euclides - 1838 - 264 pages
...subtended by one of these, as the angular unit. Each degree is moreover supposed to be subdivided into 00 equal parts, called minutes; and each minute into 60 equal parts, called seconds, and so on. The angle subtended by any number of these will, therefore, be some fractional part of the... | |
 | Charles Davies - Surveying - 1839 - 376 pages
...calculations, the circumference of the circle 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. PLANE TRIGONOMETRY. V As the circumference of a circle may be regarded as a proper measure of angles,... | |
 | Charles Davies - Surveying - 1839 - 376 pages
...calculations, the circumference of the circle 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. PLANE TRIGONOMETRY \ As the circumference of a circle may be regarded as a proper measure of angles,... | |
 | 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 - 264 pages
...a circle. 7. The circumference of a circle is used for the measurement of angles. For this purpose it is divided into 360 equal parts, called degrees,...10", are read, 9 degrees, 18 minutes, and 10 seconds. 8. Suppose the circumference of a circle to be divided into 360 equal parts, beginning at the point... | |
 | Augustus De Morgan - Algebra - 1840 - 182 pages
...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' 40" means 2 degrees, 15 minutes, and 40 seconds. To find the area of a sector, very nearly,... | |
 | Augustus De Morgan - Algebra - 1840 - 186 pages
...the radius by 3-1415927. - The right angle is divided into 90 equal parts called degrea, each degree into 60 equal parts called minutes, and each minute into 60 equal parts called seccnde. Thus, 2° 15' 40" means 2 degrees, 15 minutes, and 40 seconds. To find the area of a sector,... | |
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Each degree is divided into 60 equal parts called minutes, and each minute into 60 equal parts called seconds. 
