Books Books Every circumference of a. circle, whether the circle be large or small, is supposed to be 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. ELEMENTARY SYNTHETIC GEOMETRY OF THE POINT, LINE AND CIRCLE IN THE PLANE - Page 19
by N. F. DUPUIS, M.A., F.R.S.C. - 1894 ## First Lessons in Geometry: With Practical Applications in Mensuration, and ...

Charles Davies - Geometrical drawing - 1840 - 252 pages
...circumference of a circle is used for the measurement of angles. For this purpose it is divided into 360 equal parts, called degrees, each degree is divided...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,... ## The Elements of Arithmetic

Augustus De Morgan - Algebra - 1840 - 166 pages
...the radius by 3-1415927. * The right angle is divided into 90 equal parts called degrees, each degree into 60 equal parts called minutes, and each minute into 60 equal parts called seconds. Thus, 2° 15' 40" means 2 degrees, 15 minutes, and 40 seconds. To find the area of a sector, very nearly,... ## The Elements of Arithmetic

Augustus De Morgan - Algebra - 1840 - 166 pages
...the radius by 3-1415927. - The right angle is divided into 90 equal parts called degrea, each degree into 60 equal parts called minutes, and each minute into 60 equal parts called seccnde. Thus, 2° 15' 40" means 2 degrees, 15 minutes, and 40 seconds. To find the area of a sector,... ## Boston School Atlas

Benjamin Franklin Edmands - Geography - 1841 - 75 pages
...Antarctic Circle. See fig. 2. A DEGREE is the 360th part of a circle, and contains CPJ English miles ; each degree is divided into 60 equal parts, called...and each minute into 60 equal parts, called seconds. They are marked (°) degrees, (') minutes, (") seconds. The LONGITUDE of a place, is its distance from... ## Elements of Surveying, and Navigation: With a Description of the Instruments ...

Charles Davies - Navigation - 1835 - 359 pages
...calculations, the circumference of the circle is divided into 360 equal parts, called degrees; each degree into 60 equal parts, called minutes; and each minute into 60 equal parts, called seconds. PLANE TR16ONOMETRY. As the circumference of a circle maybe regarded as a proper measure of angles,... ## A New System of Arithmetic, on the Cancelling Plan: Embracing the Rules of ...

Charles Guilford Burnham - Arithmetic - 1841 - 312 pages
...every circle is supposed to be divided into 360 equal parts, called degrees; and each degree into 0O equal parts, called minutes; and each minute into 60 equal parts, called seconds; and these into thirds, &c. Hence a semi-circle containi 180 degrees, and a quadrant 90 degrees. 15.... ## Arithmetic on the Productive System: Accompanied by a Key and ..., Book 3

Roswell Chamberlain Smith - Arithmetic - 1841 - 311 pages
...through the centre of the earth. 15 CORRESPOH D, [L. eorrespondeo.} To answer to ; communicate with. parts, called minutes, and each minute into 60 equal parts, called seconds. 76. The circumference1 of the earth is a great circle of 360 de prees. On this circle every minute... ## Course of Civil Engineering: Comprising Plane Trigonometry, Surveying, and ...

John Gregory - 1842 - 301 pages
...standard derived from the division of a circle into 360 equal parts, called degrees ; each degree being divided into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds, &c. As angles are proportional to the arcs on which they stand (33.6,) the subdivision of the circumference... ## Elements of Geography, Modern and Ancient with a Modern and an Ancient Atlas

Joseph Emerson Worcester - Geography - 1844 - 331 pages
...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. " They are marked thus, 23° 28' 16"; ie 83 degrees, 23 minutes, and 16 seconds. The Equator is an... 