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" 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. "
Mathematical Dictionary and Cyclopedia of Mathematical Science: Comprising ... - Page 26
by Charles Davies - 1872
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The Element of Geometry

John Playfair - Trigonometry - 1836 - 114 pages
...The circumference of a circle may be supposed to be divided into 360 equal parts called degrees ; and each degree into 60 equal parts called minutes, and each minute into 60 equal parts called seconds, &c. And as many degrees, minutes, seconds, &c. as are contained in any arc, of so many degrees, minutes,...
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A System of Natural Philosophy: In which the Principles of Mechanics ...

John Lee Comstock - Physics - 1836 - 295 pages
...already seen, the sun appears to move Each of the 12 signs of the zodiac is divided (nto 30 smaller parts, called degrees; each degree into 60 equal parts, called minutes, and each minute into BO parts, called seconds.) The division of the zodiac into signs, is of very ancient date, each sign...
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Elements of Surveying: Including a Description of the Instruments and the ...

Surveys - 1837 - 249 pages
...utmost accuracy. 41. For the purposes of trigonometrical calculations, the circumference of the circle is divided into 360 equal parts, called degrees ;...and each minute into 60 equal parts, called seconds. As the circumference of a circle may be regarded as a proper measure of angles, having their vertices...
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A Treatise on Astronomy

L. H. Tyler - 1837
...plane of a circle. (21.) DBF. 4. Every circle, from the smallest to the largest, is conceived to be divided into 360 equal parts, called degrees ; each...and each minute into 60 equal parts, called seconds. These divisions are usually expressed by signs : thus, 15 10' 15" signifies five degrees, ten minutes,...
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A Treatise on Mensuration for the Use of Schools

Commissioners of National Education in Ireland - 1837 - 262 pages
...circumference pf every circle is generally divided into 360 equal parts, called degrees ; and every degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds. The angles are measured by the number of degrees contained in the arcs which subtend them ; thus, if the...
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Treatise on Arithmetic, in Theory and Practice: With an Appendix, Containing ...

James Thomson (LL.D.) - Arithmetic - 1837 - 284 pages
...every circle is supposed to be divided into 360 equal parts, called degrees;* each degree is subdivided into 60 equal parts, called minutes; and each minute into 60 equal parts, called seconds. MISCELLANEOUS TABLE. 12 articles =1 dozen ,-. ( 12 dozen = 1 gross 6 6core or 120" = i.ong 20 articles...
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A complete treatise on practical land-surveying

Thomas Holliday - 1838
...their opening or inclination to each other. 2. The circumference of every circle is supposed to be divided into 360 equal parts, called degrees; each...into 60 equal parts, called minutes; and each' minute again into 60 equal parts, called seconds. The angles are measured by the number of degrees, &c., cut...
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High-school Astronomy

Hiram Mattison - Astronomy - 1872 - 252 pages
...sometimes called radiations or itldianr-6. All circles, whether great or small, are supposed to be divided into 360 equal parts, called degrees / each degree into 60 equal paits, called minutes; and each minute into 60 equal parts, called seconds. They are marked respectively...
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An Elementary Geometry and Trigonometry

William Frothingham Bradbury - Geometry - 1873 - 238 pages
...Trigonometry treats of methods of computing plane angles and triangles. П, The circumference of every circle is divided into 360 equal parts, called degrees (...and each minute into 60 equal parts, called seconds ( " ). I8 As angles at the centre vary as their arcs, or arcs as their corresponding angles, the...
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The Illustrative Practical Arithmetic ...

George Augustus Walton - Arithmetic - 1873 - 336 pages
...plane surface ; circle ; circumference ; arc ; radius ; diameter. 330. The circumference of a circle is divided into 360 equal parts called degrees, each degree into 60 minutes, and each minute into 60 seconds. These are the units of CIRCULAR MEASURE. TABLE. 60 seconds...
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