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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 °, ', ", '", &c....
A Treatise of Plane Trigonometry: To which is Prefixed, a Summary View of ... - Page 37
by Jeremiah Day - 1815 - 126 pages

## An essay on mechanical geometry, explanatory of a set of models

Benjamin Donne - 1796 - 120 pages
...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...

## A Summary of Geography and History, Both Ancient and Modern ...: With an ...

Alexander Adam - Classical dictionaries - 1802 - 914 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...

## A Treatise on Plane and Spherical Trigonometry: With Their Most Useful ...

John Bonnycastle - Trigonometry - 1806 - 464 pages
...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,...

## General Geography, and Rudiments of Useful Knowledge: In Nine Sections ...

Horatio Gates Spafford - Astronomy - 1809 - 448 pages
...and are commonly parallel to some great one. These are the two tropics, and the two polar circles. Every circle whether great or small, is supposed to be divided into 360 equal parts called degrees; und each degree into 60 equal pans called minutes ; each minute into 60 equal parts called .seconds....

## An Introduction to the Theory and Practice of Plane and Spherical ...

Thomas Keith - Navigation - 1810 - 478 pages
...the angle aBC 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 degree into 60 equal parts called minutes, each minute into 60 equal parts called seconds. The angles are measured...

## A pocket encyclopædia, or library of general knowledge

Edward Augustus Kendall - 1811 - 462 pages
...of a circle, contained between the two legs, having the angular point for its centre. Ev.ery circle is supposed to be divided into 360 equal parts, called degrees ; each degree into 60 equal parti, called minutes \$ each minute into' 60 equal parts, called seconds. " An angle is said...

## A New Treatise on the Use of the Globes, Or, A Philosophical View of the ...

Thomas Keith - Astronomy - 1811 - 388 pages
...beginning of the year 1804, was 13° 14' 43" and its declination 80° "15' 44" north. \$ 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. ; a degree is, therefore,...

## A Treatise of Plane and Spherical Trigonometry: In Theory and Practice ...

Francis Nichols - Plane trigonometry - 1811 - 162 pages
...the other circle, subtending the same angle ABC. 5. COR. 4. Hence, if a circle of any radius whatever be divided into 360 equal parts, called degrees, each degree into 60 equal parts, called minutes; each minute into 6O equal parts, called seconds, &c., the number of degrees,...