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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, each minute into 60 equal parts called seconds.
Elements of Surveying: With the Necessary Tables - Page 21
by Charles Davies - 1830 - 306 pages

## An introduction to the theory ... of plane and spherical trigonometry ...

Thomas Keith - 1839 - 498 pages
...measure of the angle aBc, and the arc DE is the measure of the angle ABC. (56) The circumference of every circle is supposed to be divided into 360 equal parts...degrees, each degree into 60 equal parts called minutes, each minute into 60 equal parts called seconds. The angles are measured by the number of degrees cut...

## The star, a complete system of the theoretical and practical astrology, by ...

J. David Parkes - 1839 - 222 pages
...Aquarius, and X Pisces, which 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;...

## A Course of Mathematics: Containing the Principles of Plane ..., Volumes 1-3

Jeremiah Day - Geometry - 1839 - 432 pages
...measuring the 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 °,...

## A Treatise on Trigonometry, and on Trigonometrical Tables and Logarithms ...

John Hymers - Logarithms - 1841 - 242 pages
...certain angle fixed upon as the unit of angular measure. For this purpose we divide a right angle into 90 equal parts called degrees, each degree into 60 equal parts called minutes, each minute into 60 equal parts called seconds ; then an angle is expressed by the number of degrees,...

## Encyclopaedia Americana: A Popular Dictionary of Arts, Sciences ..., Volume 5

1844 - 634 pages
...brazen meridian is the circle in which the anifi- L cial globe turns, divided into 360 degree*. Every circle is supposed to be divided into 360 equal parts,...called degrees, each degree into 60 equal parts, called minute*, \ each minute into 60 equal parts, called seconds, &c. ; a degree is therefore only a relative...

## An Elementary Treatise on Mineralogy: Comprising an Introduction to the Science

William Phillips - Mineralogy - 1844 - 832 pages
...angles is the number of degrees, minutes, &,c. of which they consist. In measuring angles, the circle is divided into 360 equal parts, called degrees ; each...equal parts, called minutes ; and each minute into 60 seconds : the divisions being thus designated : 360°, 60', GO". If one fourth part of the circle,...

## A Treatise on Plane and Spherical Trigonometry: Including the Construction ...

Enoch Lewis - Conic sections - 1844 - 234 pages
...semicircle, is called its supplement. Thus BHD is the supplement of AB. 10. The circumference of every circle is supposed to be divided into 360 equal parts,...degrees; each degree into 60 equal parts, called minutes; each minute into 60 equal parts, called seconds, &c. Degrees, minutes and seconds are designated thus,...

## An Elementary Treatise on Mineralogy: Comprising an Introduction to the Science

William Phillips - Mineralogy - 1844 - 834 pages
...angles is the number of degrees, minutes, &c. of which they consist. In measuring angles, the circle is divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called c* XXVI be intercepted by which meet at an minutes ; and each minute into 60 seconds : the divisions...