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" The circumference of every circle is supposed to be divided into 360 equal parts, • called degrees, each degree into 60 minutes, and each minute into 60 seconds, etc. "
Elements of Plane and Spherical Trigonometry: With Their Applications to ... - Page 20
de Elias Loomis - 1855 - 178 pages
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A new system of mathematics: Containing plane gometry; general investigation ...

1769 - 92 pages
...they fubtend will be in the fame ratio. C NB NB Mathematicians divide the circumference of a circle into 360 equal parts, called degrees, each degree into 60 minutes, and each minute into 60 feconds. Thefe divifions being marked on a femi-circle of brafs, or on an ivory rectangle, called protraftor,...
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New Elements of Mathematics: Or Euclid Corrected. Containing Plane Gometry ...

John Muller - 1773 - 130 pages
...in the fame ratio. C 3 NE NB Mathematicians divide the cir-r cumference of a circle into 360 equa} parts, called degrees, each degree into 60 minutes, and each minute into 60 feconds. Thefe divifions being marked on a femi-circle of brafs, or on an ivory recl> angle, called...
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An essay on mechanical geometry, explanatory of a set of models

Benjamin Donne - 1796
...calculating the proportion which angles bear to each other, fuppofe the circumference of every circle to be divided into 360 equal parts, called Degrees ; each degree into 60 equal parts, called minutes ; each minute into 60 equal parts named feconds, &c. Ar. B. Sometimes the...
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Mathematics: Compiled from the Best Authors and Intended to be the ..., Volume 1

Samuel Webber - 1801
...the two sides, that, which stands at the angular point, is rend in the middle. C 56. The 39° 5 6. The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 minutes, each minute into do seconds, and so on. Hence a semicircle contains...
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A Summary of Geography and History, Both Ancient and Modern ...: With an ...

Alexander Adam - 1802 - 858 pages
...radii of the fame circle are always equal to one another. The circumference of every circle is fuppofed to be divided into 360 equal parts, called degrees ; each degree into 60 mi* ñutes \ each minute into 60 feccnds ; and thefe into thirds, fourths, &c. greater or ¡efs according...
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A System of Geometry and Trigonometry: Together with a Treatise on Surveying ...

Abel Flint - 1804 - 168 pages
...the Centre ; and it divides the Circle into two equal parts, called Semicircles ; as AB or DE. 14. 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...
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The shipwright's vade-mecum [by D. Steel].

David Steel - 1805
...centre to the circumference of a circle, is called a Radius. All the radii of the same circle are equal. The circumference of every circle is supposed to be divided into 360 parts, called degrees; each degree into 60 equal parts, called minutei; and each minute into 60 equal...
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A Treatise on Plane and Spherical Trigonometry: With Their Most Useful ...

John Bonnycastle - 1806 - 419 pages
...by an arc of a circle contained between its two legs, and having the angular point for its centre. Every circle is supposed to be divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes ; each minute into 60 equal parts, called seconds ; &c. So that a semicircle,...
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A Treatise of Practical Surveying: Which is Demonstrated from Its First ...

Robert Gibson - 1806 - 452 pages
...circumference into two equal parts called semicircles ; and is double the radius, as AB or DE. fig. 8. • 18. 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,...
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An Introduction to the Theory and Practice of Plane and Spherical ...

Thomas Keith - 1810 - 420 pages
...thus the arc *c is the measure of the angle aBC and the arc DE is the measure of the angle ABC. (H) The circumference of every circle is supposed to be...360 equal parts called degrees, each degree into 60 equal parts called minutes, each minute into 60 equal parts called seconds. The angles are measured...
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