Books Books 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 . NOTE. A System of Geometry and Trigonometry: With a Treatise on Surveying; in ... - Page 10
by Abel Flint - 1838 - 334 pages ## A Treatise of Algebra in Two Books: The First Treating of the Arithmetical ...

Philip Ronayne - Algebra - 1738 - 421 pages
...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 is meafured by the Number of Degrees... ## The Theory and Practice of Gauging: Demonstrated in a Short and Easy Method ...

Robert Shirtcliffe - Gaging - 1740 - 283 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... ## The Young Mathematician's Guide: Being a Plain and Easy Introduction to the ...

John Ward - Mathematics - 1747 - 480 pages
...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...and each Minute into 60 equal Parts, called Seconds, &V. Any Portion of whofe Circumference is called an Arch, and is meafured by the Number of Degrees... ## The Young Mathematician's Guide: Being a Plain and Easy Introduction to the ...

John Ward (of Chester.) - Mathematics - 1747 - 480 pages
...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...and each Minute into 60 equal Parts, called Seconds, ÜV. Any Portion of whofe Circumference is called an Arch, and is meafured by the Number of Degrees... ## Trigonometry, Plane and Spherical: With the Construction and Application of ...

Thomas Simpson - Logarithms - 1748 - 77 pages
...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 Minute into 60 equal Parts, called Seconds, or fecond Minutes, &c. B G 3. Any Part AB of H the Periphery of the Circle is called an Arch, and is... ## A New Introduction to the Mathematicks: Being Essays on Vulgar and Decimal ...

Benjamin Donne - Algebra - 1758 - 372 pages
...called a Day ; which Day they fubdivided into 24 equal Parts called Hours, and each of thefe again into 60 equal Parts called Minutes, and each Minute into 60 equal Parts called Seconds, &c. Further, the Time which is elapfed between the Inftant when the Sun is in the Equinox, or firlt... ## Instructions Given in the Drawing School Established by the Dublin Society ...

Joseph Fenn - Mathematics - 1769
...conceived to be divided into 360 equal parts, ivbicb are (ailed DEGREES ; and each of tbefe degrees into 60 equal parts, called MINUTES ; and each minute into 60 equal parts, called SECONDS 6fr. in con/equence of this bypotheßs, У the correfpondence eßabliflied between the arches, У the... ## Instructions Given in the Drawing School Established by the Dublin Society ...

Joseph Fenn - Mathematics - 1769
...to be divided into 360 equal parts, -which are callea DEGREES ¡ and each of tbefe degrees into ¿o equal parts, called MINUTES ; and each minute into 60 equal parts, called SECONDS &c. in confequence of ibis bypotheßs, У the correjpondence eßablijhed bet-ween the arches, У the... ## The Young Mathematician's Guide: Being a Plain and Easy Introduction to the ...

John Ward - Mathematics - 1771 - 480 pages
...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 Minute into 60 equal Parts, called Seconds, &c. Any Portion of whc/e Circumference is called an Arch, and is mcaof Degrees it contains.' 2. A Chord... 