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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, &c.
The Theory and Practice of Surveying: Containing All the Instructions ... - Σελίδα 43
των Robert Gibson - 1821 - 544 σελίδες
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## A Treatise of Algebra in Two Books: The First Treating of the Arithmetical ...

Philip Ronayne - 1717 - 408 σελίδες
...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...

## The Description, Nature and General Use, of the Sector and Plain-scale ...

Edmund Stone - 1721 - 44 σελίδες
...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...

## A Compleat Treatise of Practical Navigation Demonstrated from It's First ...

Archibald Patoun - 1734 - 414 σελίδες
...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;...

## A Treatise of Algebra in Two Books: The First Treating of the Arithmetical ...

Philip Ronayne - 1738 - 421 σελίδες
...I. Of DEFINITIONS. i. A Circle is fuppos'd to be r\ divided into 360 equal Parts, called Degrees j and each Degree into 60 equal Parts, called Minutes ; and each Minute into 60 equal Parts, called Seconds 5 t£c. Any Portion \ of whofe Circumference is called an Arch, and...

## The Theory and Practice of Gauging: Demonstrated in a Short and Easy Method ...

Robert Shirtcliffe - 1740 - 283 σελίδες
...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 Description, Nature and General Use, of the Sector and Plain-scale ...

Edmund Stone - 1746 - 44 σελίδες
...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^ becaufe it may be divided...

## The Young Mathematician's Guide: Being a Plain and Easy Introduction to the ...

John Ward - 1747 - 480 σελίδες
...of that Arch. IPIane ^Trigonometry. I. A Circle is -tJL vidcd into DEFINITIONS. fuppos'd to be di-. 360 equal Parts, called Degrees ; and each Degree...equal Parts, called Minutes ; and each Minute into 60 equal Parts, called Seconds, &V. Any Portion of whofe Circumference is called an Arch, and is meafured...

## The Young Mathematician's Guide: Being a Plain and Easy Introduction to the ...

John Ward (of Chester.) - 1747 - 480 σελίδες
...the Secant ofthat Arch. IPlane I. Л Circle is DEFINITIONS. fuppos'd to be divided into 360 ecjual Parts, called Degrees ; and each Degree into 60 equal Parts, called Minutes ; and each Minute into 60 equal Parts, called Seconds, ÜV. Any Portion of whofe Circumference is called an Arch, and is meafured...

## Trigonometry, Plane and Spherical: With the Construction and Application of ...

Thomas Simpson - 1748 - 77 σελίδες
...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;...equal Parts, called Minutes ; and each Minute into 60 equal Parts, called Seconds, or fecond Minutes, &c. B G 3. Any Part AB of H the Periphery of the...

## The Young Mathematician's Guide: Being a Plain and Easy Introduction to the ...

John Ward - 1771 - 480 σελίδες
...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...equal Parts, called Minutes ; and each Minute into 60 equal Parts, called Seconds, &c. Any Portion of whc/e Circumference is called an Arch, and is mcaof...