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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. "
A Treatise of Plane and Spherical Trigonometry: In Theory and Practice ... - Page ix
by Francis Nichols - 1811 - 128 pages
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The Second [-fifth and Sixth] Part of A Course of Mathematics: Adapted to ...

Jeremiah Day - Geometry - 1824 - 440 pages
...latter, a circle is introduced. The periphery of every circle, whether great or small, is supposed to be divided into 360 equal parts called degrees, each degree into 60 minutes, each minute into 60 seconds, each second into 60 thirds, &c. marked with the characters °,...
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Astronomy, as it is Known at the Present Day: With an Account of the Nature ...

George G. Carey - Astronomy - 1825 - 274 pages
...the plane of the circle. 8. Degrees, fyc. — All circles, whether great or small, are 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, &c.f 9. An Angle is the inclination of two lines...
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An Introduction to the Theory and Practice of Plain and Spherical ...

Thomas Keith - Navigation - 1826 - 504 pages
...and the arc DE is the measure of the angle ABC. (H) The circumference of every circle is supposed to be divided into 360 equal parts called degrees, each...into 60 equal parts called minutes, each minute into 60 equal parts called seconds. The angles are measured by the number of degrees cut from the circle...
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Geometrical Problems Deducible from the First Six Books of Euclid: Arranged ...

Miles Bland - Euclid's Elements - 1827 - 462 pages
...angle (7.) Till lately. Geometers almost unanimously agreed to divide the circumference of the circle into 360 equal parts called Degrees ; each degree into 60 equal parts called Minutes; and each minute into 60 equal parts called Seconds, &c. This method appeared to the Greek Geometers...
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The Complete Mathematical and General Navigation Tables: Including ..., Volume 1

Thomas Kerigan - Nautical astronomy - 1828 - 776 pages
...hemisphere, and the other, the southern hemisphere. — The equator, like all other great circles, is divided into 360 equal parts, called degrees ; each...60 equal parts, called minutes } each minute into 60 equal parts, called seconds, and so on. The Meridian, of any place on the earth is a great circle...
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The Common School Manual: A Regular and Connected Course of Elementary ...

Montgomery Robert Bartlett - Education - 1828 - 426 pages
...the circle inUlour equal parts called quadrants. 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; and these into thirds, &c. Now, as all circles...
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Elements of Geometry and Trigonometry: With Notes

Adrien Marie Legendre - Geometry - 1828 - 346 pages
...I. For the purposes of trigonometrical calculations, the circumference of the circle is conceived 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. The semicircumference, or the measure of two right...
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An Introduction to Mensuration and Practical Geometry

John Bonnycastle - Geometry - 1829 - 256 pages
...called legs. PRACTICAL GEOMETRY. 21 D / -E B *47. 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 so on. 48. The measure of any right-lined angle is an arc of a circle contained between the two...
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Elements of Geometry and Trigonometry: With an Easy and Concise System of ...

James Hale - Surveying - 1829 - 124 pages
...Supplement of the Arch FA. Fig. 10. 28. The Circumference of every Circle is supposed to be divided into 300 equal parts, called Degrees ; each Degree into 60 equal parts, called Minutes ; and these into Thirds, &,c. 29. The measure of an Angle is the Arch of a Circle contained between...
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First lessons in Plane Geometry. Together with an application of them to the ...

Francis Joseph Grund - Geometry, Plane - 1830 - 274 pages
...arcs of circles, described with any radius between their legs. The circumference is for this purpose divided into 360 equal parts, called degrees; each...degree into 60 equal parts, called minutes; each minute again into 60 equal parts, called seconds, &c. 16. The magnitude of an angle does not depend on the...
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