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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 minutes, each minute into 60 seconds, and so on. "
Trigonometry, Plane and Spherical: With the Construction and Application of ... - Page 1
by Thomas Simpson - 1748 - 77 pages
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The Universal Library: Or, Compleat Summary of Science. Containing Above ...

H. Curzon - Encyclopedias and dictionaries - 1712 - 596 pages
...one fide more than another. And an Oblique Angle is either Acute, (ie Sharp) or Obtufe, /'. e. Blunt. Every Circle is fuppofed to be divided into 360 equal Parts, called Degrees, and every Degree into 60 Minutes, and each Minute into 60 Seconds, &c. Some fuppofe every Degree to be...
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A Treatise of Algebra in Two Books: The First Treating of the Arithmetical ...

Philip Ronayne - Algebra - 1717 - 478 pages
...«r U v ^ > I « PARTI. .•;.-. . ... Of TRIGONOMETRf. f * r*" . У ;: "> •" ^ Definitions. ï; Д Circle is fuppofed to be ^* divided into 360 equal Parts, called Degrees, and each Degree into 60 equab Pans>calledMinutes,?md each Minute into 60 eqpal Parts1 called Seconds , ÖV. Any Partien -of...
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The Young Mathematician's Guide: Being a Plain and Easie Introduction to the ...

John Ward - Mathematics - 1719 - 472 pages
...ntceffarj to fremife, That I. The Periphery (or Circumference') of every Circle (whether Great or Small} is fuppofed to be Divided into 360 equal Parts, called Degrees ; And every one of thofe Degrees are Divided into 60 equal Parti called Minutes, &c. •: All Jnglet are...
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The Description, Nature and General Use, of the Sector and Plain-scale ...

E. S., Edmund Stone - Compasses (Mathematical instruments) - 1721 - 60 pages
...that Arc$ whence the greateft Semitangent, or that of 1 80 Degrees, is infinite. The Circumference of every Circle is fuppofed to be divided into 360 equal Parts, called Degrees ; and each Degree in 60 equal Parts, called Minutes, &c. This Number was chofen by Geometricians for the Diviiion of...
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A Compleat Treatise of Practical Navigation Demonstrated from It's First ...

Archibald Patoun - Navigation - 1734 - 568 pages
...the Circle and Circumference into two equal Parts, and is double the Radius. 1 6. The Circumference of every Circle is fuppofed to be divided into 360 equal Parts, called Degrees ; and each Degree is divided into 60 equal Parts, called Minutes ; and each Minute into 60 e?ual Parts, called Seconds;...
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The Theory and Practice of Gauging, Demonstrated in a Short and Easy Method ...

Robert Shirtcliffe - Gaging - 1740 - 322 pages
...Ancients divided the Circumference of a Circle into 360 equal Parts, each of which they called a Degree ; and each Degree into 60 equal Parts called Minutes ; and each Minute into 60 Parts called Seconds, and fo on to thirds, fourths, &c. every Arch of a Circle, being denoted by the...
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The Description, Nature and General Use, of the Sector and Plain-scale ...

Edmund Stone - Mathematical instruments - 1746 - 62 pages
...Arcs Arc 5 whence the greatefi Semitangent, or that of 180 Degrees, is infinite. The Circumference of every Circle is fuppofed to be divided into 360...and. each Degree into 60 equal Parts, called Minutes, &V. This Number was chofen by Geometricians for the Divifion of a Circle^ becaufe it may be divided...
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Navigation New Modelled

Henry Wilson - Navigation - 1761 - 580 pages
...at a, is the Center of the Circle required. SECT. II. The ConftmSlion of Sines, Sec.' E VERY great Circle is (fuppofed to be) divided into 360 equal Parts, called Degrees, whereof the Half, or Semicircle, contains 180 Degrees, and the Quarter or Quadrant is 90 Degrees, and...
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The Elements of Euclid, Viz: The Errors, by which Theon, Or Others, Have ...

Robert Simson - Trigonometry - 1775 - 534 pages
...meafure of the angle ABC. II. The circumference of a circle is fuppofed to be divided into H h ' 360 360 equal parts called degrees, and each degree into...60 equal parts called minutes, and each minute into 6e equal parts called feconds, &c. And as many degrees, minutes, feconds, &c as are contained in any...
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The Navigator's Assistant: Containing the Theory and Practice of Navigation ...

William Nicholson - Navigation - 1784 - 462 pages
...;the arc BC : the arc b c. Which was tobe proved. Scholium. In the practical admeafurement of angles, every circle is fuppofed to be divided into 360 equal parts called degrees, which degrees are again divided each into 60 equal parts called minutes, and thofe minutes again each...
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