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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 Treatise of Algebra in Two Books: The First Treating of the Arithmetical ... - Pągina 258
per Philip Ronayne - 1717 - 408 pągines
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The Universal Library: Or, Compleat Summary of Science. Containing Above ...

H. Curzon - 1712 - 596 pągines
...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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The Young Mathematician's Guide: Being a Plain and Easie Introduction to the ...

John Ward - 1719 - 472 pągines
...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 - 1721 - 60 pągines
...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 - 1734 - 568 pągines
...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 Description, Nature and General Use, of the Sector and Plain-scale ...

Edmund Stone - 1746 - 62 pągines
...5 whence the greatefi Semitangent, or that of 180 Degrees, is infinite. The Circumference of every Circle is fuppofed to be divided into 360 equal Parts, called Degrees ; and. each Degree into 60 equal Parts, called Minutes, &V. This Number was chofen by Geometricians for the Divifion of a Circle^...
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Trigonometry, Plane and Spherical: With the Construction and Application of ...

Thomas Simpson - 1748 - 84 pągines
...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 Minutes,...
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Navigation New Modelled

Henry Wilson - 1761 - 580 pągines
...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 - 510 pągines
...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 Portion...
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The Navigator's Assistant: Containing the Theory and Practice of Navigation ...

William Nicholson - 1784 - 462 pągines
...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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The Practical Navigator, and Seaman's New Daily Assistant: Being an Epitome ...

John Hamilton Moore - 1791 - 578 pągines
...Degree is the ßooth Part of the Circumference of any Circle. All Circles, whether great or fmall, are 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. A Semicircle...
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