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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, etc.
A Compleat Treatise of Practical Navigation Demonstrated from It's First ... - Page 4
de Archibald Patoun - 1734 - 414 pages
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## The Universal Library; Or, Compleat Summary of Science: Containing ..., Volume 2

Henry Curzon - 1712
...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 - 1717 - 408 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...
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## The Young Mathematician's Guide: Being a Plain and Easie Introduction to the ...

John Ward - 1719 - 451 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 ...

Edmund Stone - 1721 - 44 pages
...the Tangent of half that Arc\$ whence the greateft Semitangent, or that of 1 80 Degrees, is infinite. The Circumference of every Circle is fuppofed to be...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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## Trigonometry, Plane and Spherical: With the Construction and Application of ...

Thomas Simpson - 1748 - 77 pages
...and about, the Circle, be fuppofed divided into fome afligned Number of equal Parts. 2. The Periphery of every Circle is fuppofed 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, or fecond...
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## Navigation New Modelled

Henry Wilson - 1761 - 528 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 Young Mathematician's Guide: Being a Plain and Easy Introduction to the ...

John Ward - 1771 - 480 pages
...of this Problem, RN: SN::RA: Г A. And RN : RS : : RA : RT= the Secant of that Arch. DEF INITIONS. Circle is fuppofed 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, &c. Any...
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## The Navigator's Assistant: Containing the Theory and Practice of Navigation ...

William Nicholson - 1784 - 223 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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## Elements of Plane and Spherical Trigonometry: Written Originally in Russian ...

Vasiliĭ Nikitich Nikitin, Prokhov Ignatévich Suvorov - 1786 - 101 pages
...ftrait lines belong as well to the arches, as to the angles at the center, which ftand on them. 2 . The circumference of every circle is fuppofed to be divided into 360 equal parts, which are called degrees (poij <xî, gradus) -, and every degree into 60 equal parts, which are called...
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## A Treatise of Practical Surveying: Which is Demonstrated from Its First ...

Robert Gibson - 1795 - 319 pages
...Circumference into two equal Parls oukd Semicircles ; and is double the Radius, as AB cr DE. Fig. 8. 1 8. The Circumference of every Circle is fuppofed to be...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 thefe into...
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