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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.
First lessons in Plane Geometry. Together with an application of them to the ... - Page 173
by Francis Joseph Grund - 1830 - 12 pages
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Elements of Geometry and Trigonometry: With Notes

Adrien Marie Legendre - Geometry - 1828 - 346 pages
...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 - 252 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 - 115 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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Elements of Surveying: With the Necessary Tables

Charles Davies - Surveying - 1830 - 318 pages
...For the purposes of trigonometrical calculations, the circumference of the 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. 26. As the circumference of a circle may be...
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Elements of Geometry and Trigonometry: With Notes

Adrien Marie Legendre - Geometry - 1830 - 344 pages
...of trigonometrical calculations, the circumference of the circle is conceived to be divided into 36O 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...
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A New and Easy Introduction to the Mathematics: Containing. A system of ...

Ira Wanzer - Arithmetic - 1831 - 396 pages
...used by Astronomers, Navigators, &c. Note 2. — 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 seconds, and each second into 60 thirds, &c. 16. Of Particulars. 12 Particular things make...
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An Elementary Treatise on Geometry: Simplified for Beginners Not ..., Part 1

Francis Joseph Grund - Geometry, Plane - 1834 - 190 pages
...also equal ; and the reverse is also true ; that is, if the two arcs intercepted by the legs of the two angles at the centre of a circle, are equal to...16. The magnitude of an angle does not depend on the length of the arc intercepted by its legs; but merely on the number of degrees, minutes, seconds, &c.,...
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Elements of Plane Trigonometry

William Smyth - Plane trigonometry - 1834 - 94 pages
...described with equal radii. 10. The entire circumference of every circle, whether great or small, is divided into 360 equal parts called degrees, each...degree into 60 equal parts called minutes, each minute into 60 equal parts called seconds, each second into 60 equal parts called thirds, &c. The character...
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An Elementary Treatise on Geometry: Simplified for Beginners Not ..., Part 1

Francis Joseph Grund - Geometry, Plane - 1834 - 190 pages
...If the circumference of a circle is divided into 360 equal parts, called degrees ; each degree again into 60 equal parts, called minutes; each minute again into 60 equal parts, called seconds, &c.; it is easy to perceive, that the magnitude of an angle does not depend upon the length of the arc intercepted...
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Mathematics for Practical Men: Being a Common-place Book of Principles ...

Olinthus Gregory - Mathematics - 1834 - 480 pages
...(See the next figure.) 3. The circumference of a circle is supposed to be divided or to be divisible into 360 equal parts, called degrees; each degree into 60 equal parts, called minutes; each of these into 60 equal parts, called seconds ; and so on to the minutest possible subdivisions. Of...
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