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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.
Elements of Plane and Spherical Trigonometry: With Their Applications to ... - Página 4
por Olinthus Gregory - 1816 - 244 páginas
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## An Elementary Geometry and Trigonometry

William Frothingham Bradbury - 1872 - 238 páginas
...of methods of computing plane angles and triangles. 17. The circumference of every circle is dividad into 360 equal parts, called degrees ( ° ), each degree into 60 equal parts, called minutes ( ' ), and each minute into 60 equal parts, called seconds ( " ). 18. As angles at the centre valy...
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## Elements of Plane and Spherical Trigonometry: With Practical Applications

Benjamin Greenleaf - 1876 - 170 páginas
...fixed upon as the unit of angular measure. For this purpose a right angle is generally divided into 90 equal parts called degrees, each degree into 60 equal parts called minutes, each minute into 60 equal parts called seconds ; then an angle is expressed by the number of degrees, minutes,...
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## The Normal Higher Arithmetic: Designed for Common Schools, High Schools ...

Edward Brooks - 1877 - 542 páginas
...circumference is called a quadrant. 399. 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 <50 equal parts called seconds. 400. Any angle having its vertex at the centre, is measured...
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## The Normal Union Arithmetic: Graded Course, Parte2

Edward Brooks - 1877 - 230 páginas
...circumference is called a quadrant. , 290. 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. 291. Any angle having its vertex at the centre, is measured...
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## The New Normal Written Arithmetic: Designed for Common Schools, Normal ...

Edward Brooks - 1877 - 421 páginas
...circumference is called a quadrant. * 290. 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. 2O1. Any angle having its vertex at the centre, is measured...
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## The New Normal Written Arithmetic: Designed for Common Schools, Normal ...

Edward Brooks - 1877 - 421 páginas
...circumference is called a quadrant. 290. 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 GO equal parts, called seconds. 291. Any angle having its vertex at the centre, is measured...
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## The Elementary Arithmetic: Oral and Written

Albert Newton Raub - 1877 - 164 páginas
...and limited by the circumference, as AD, is called a Diameter. 129. Every 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. TABLE. 60 seconds ( " ) =1 minute, ( ' ). 60 minutes...
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## The yachtsman's handybook for sea use

James Rosser - 1877
...portion (long or short) of the circumference, as AF, or B r. The circumference of every 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; which are respectively marked ° ' ". (See p. 1,...
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## Scientific and practical geometry for self-instruction

Rolla Rouse - 1879
...abdc). 20. For comparing the arc of an angle with a circumference, the latter is taken 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 ; a right angle containing 90 degrees, and a semicircle...
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## Colton's Common School Geography: Illustrated by Numerous Engravings and ...

George Woolworth Colton, Joseph Hutchins Colton - 1880 - 148 páginas
...unequal parts. 4. For the purpose of measurement, every circle is conceived to be divided into 3(30 equal parts called Degrees ; each degree, into 60 equal parts called minutes; and each minute, into GO equal parts called Seconds. Degrees are marked °, minutes ', seconds ''....
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