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" The circumference of every circle is 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 ; and these into thirds, &c. "
The First Six Books: Together with the Eleventh and Twelfth - Seite 483
von Euclid - 1781 - 520 Seiten
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Elements of Surveying: With a Description of the Instruments and the ...

Charles Davies - 1839 - 261 Seiten
...trigonometrical 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...
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Elements of Surveying: With a Description of the Instruments and the ...

Charles Davies - 1839 - 261 Seiten
...trigonometrical 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...
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The star, a complete system of the theoretical and practical astrology, by ...

J. David Parkes - 1839
...are called the twelve signs of the Zodiac. Each sign is divided into 30 equal parts, called degrees, each degree into 60 equal parts, called minutes, and each minute into 60 seconds, and so on to thirds, fourths, fifths, &c. Abréviations. — * Sextile; a Quartile; Д Trine;...
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The Elements of Arithmetic

Augustus De Morgan - 1840 - 166 Seiten
...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' 40" means 2 degrees, 15 minutes, and 40 seconds. To find the area of a sector,...
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First Lessons in Geometry: With Practical Applications in Mensuration, and ...

Charles Davies - 1840 - 252 Seiten
...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, °, ', " ; and 9° 18' 10", are read,...
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Elements of Surveying, and Navigation: With a Description of the Instruments ...

Charles Davies - 1835 - 359 Seiten
...trigonometrical 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 TR16ONOMETRY. As the circumference of a circle maybe regarded as a proper measure of...
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Boston School Atlas

Benjamin Franklin Edmands - 1841 - 75 Seiten
...2. A DEGREE is the 360th part of a circle, and contains CPJ English miles ; each degree is divided into 60 equal parts, called minutes; and each minute into 60 equal parts, called seconds. They are marked (°) degrees, (') minutes, (") seconds. The LONGITUDE of a place, is its distance...
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A New System of Arithmetic, on the Cancelling Plan: Embracing the Rules of ...

Charles Guilford Burnham - 1841 - 312 Seiten
...every circle is supposed to be divided into 360 equal parts, called degrees; and each degree into 0O equal parts, called minutes; and each minute into 60 equal parts, called seconds; and these into thirds, &c. Hence a semi-circle containi 180 degrees, and a quadrant 90 degrees....
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Course of Civil Engineering: Comprising Plane Trigonometry, Surveying, and ...

John Gregory - 1842 - 301 Seiten
...derived from the division of a circle into 360 equal parts, called degrees ; each degree being divided into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds, &c. As angles are proportional to the arcs on which they stand (33.6,) the subdivision of...
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Elements of Geography, Modern and Ancient with a Modern and an Ancient Atlas

Joseph Emerson Worcester - 1844 - 331 Seiten
...equator. 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 secotuls. They are marked thus, 23° 88' 16"; ie 23 degrees, 28 minutes, and 16 seconds. The Less Circles...
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