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" It is usual to divide the circumference of a circle into 360 equal parts, called degrees... "
The Quadrature and Geometry of the Circle Demonstrated - Page 104
by James Smith - 1872 - 269 pages
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A New System of Mathematics: Containing Plane Geometry; General ...

John Muller - Mathematics - 1769 - 152 pages
...whatever ratio two arcs have, the angles they fubtend will be in the fame ratio. C NB NB Mathematicians divide the circumference of a circle into 360 equal parts, called degrees, each degree into 60 minutes, and each minute into 60 feconds. Thefe divifions being marked on a femi-circle...
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The practical draughtsman's book of industrial design, tr. from ..., Issue 60

William Johnson - 1860 - 434 pages
...line, and curvilinear when formed by two curved lines. Measurement of Angles. — It is customary to divide the circumference of a circle into 360 equal parts called degrees. Now, if, with the apex of an angle as the centre, we describe an arc extending from leg to leg, the size...
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The ratio between diameter and circumference in a circle demonstrated by ...

James Smith - 1870 - 634 pages
...circle to its diameter ; hence, if r denote the radius of a circle, its circumference is 2 7r(r)." For all practical purposes we divide the circumference of a circle into 360 equal parts which we call degrees, and these degrees we again divide into 60 equal parts which we call minutes....
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The Workman's Manual of Engineering Drawing

John Maxton - Mechanical drawing - 1871 - 372 pages
...Fig. 92. Fig. 93. Fig. 94." Degrees. — Angles are described as of so many degrees. It is usual to divide the circumference of a circle into 360 equal parts, called degrees ; these again are divided into minutes, and the latter into seconds ; and known by the following signs...
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Maxton's Manual of Engineering Drawing

John Maxton - Mechanical drawing - 1922 - 292 pages
...Fig. 92. Fig. 93. Fig. 94. Degrees. — Angles are described as of so many degrees. It is usual to divide the circumference of a circle into 360 equal parts, called degrees ; these again are divided into D minutes, and the latter into seconds ; and known by the following...
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