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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, and these into thirds, fourths, &c.
Elements of Geometry and Trigonometry: From the Works of A.M. Legendre - Page 18
by Adrien Marie Legendre - 1874 - 455 pages

## A Series on Elementary and Higher Geometry, Trigonometry, and Mensuration ...

Nathan Scholfield - Conic sections - 1845 - 542 pages
...is supposed to be divided into 360 equal parts, called degrees, and each of those degrees is divided into 60 equal parts called minutes, and each minute into 60 equal parts called seconds ; and so on, to thirds, fourths, &c. These divisions are designated by the following characters, 0...

## A system of practical mathematics; being no.xvi. of a new series of school-books

Scottish school-book assoc - 1845 - 444 pages
...quadrant. 3. In trigonometry all the angles round a point are divided into 360 equal parts, called degrees, each degree into 60 equal parts, called minutes, and each minute into "0 equal parts, called seconds. Degrees, minutes, and seconds, are respectively designated by these...

## The University Arithmetic: Embracing the Science of Numbers, and Their ...

Charles Davies - Arithmetic - 1846 - 370 pages
...CIRCLE MEASURE OF TIME. 40. 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. For astronomical purposes, the circumference of the circle is also supposed to be divided into 12 equal...

## An introduction to the study of modern geography, with a chapter on the ...

Henry Hopwood - 1846 - 250 pages
...English mathematicians, to be divided into 360 equal parts, called degrees; each degree is subdivided into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds. Degrees are marked (°), minutes ('), and seconds ("). These degrees vary in length according to the magnitude...

## Elements of Drawing and Mensuration Applied to the Mechanic Arts: A Book for ...

Charles Davies - Geometrical drawing - 1846 - 254 pages
...angles. 26. How is it divided? It is divided into 360 equal parts called degrees, each degree is divided into 60 equal parts called minutes, and each minute into 60 equal parts called seconds. The degrees, minutes, and seconds, are marked thus, °, ', " ; and 9° 18' 10", are read, 9 degrees,...

## On the Connection of the Physical Sciences

Mary Somerville - Physical sciences - 1846 - 506 pages
...the iŤa. NOTE 50, p. 9.— Ninety degrees. A circle is divided into 360 equal parts, or degrees ; each degree into 60 equal parts, called minutes; and each minute into 60 equal pans, called seconds. It is usual to write these quantities thus, 15° 16' 10", which means fifteen...

## A Complete Treatise on Practical Land-surveying: In All Its Departments ...

Anthony Nesbit - Plane trigonometry - 1847 - 492 pages
...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. 40. The diameter of a circle is a right line drawn through the centre, and terminating in the circumference...

## The American Arithmetic

James Robinson (of Boston.) - 1847 - 304 pages
...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. Hence, a semicircle measures 180 degrees, and a quadrant 90 degrees. 46. The measure of an angle is...