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. A System of Geometry and Trigonometry: Together with a Treatise on Surveying ... - Page 10
by Abel Flint - 1825 - 241 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
...IPIane ^Trigonometry. I. A Circle is -tJL vidcd into DEFINITIONS. fuppos'd to be di-. 360 equal Parts, called Degrees ; and each Degree into 60 equal Parts,...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... ## Trigonometry, Plane and Spherical: With the Construction and Application of ...

Thomas Simpson - Logarithms - 1748 - 77 pages
...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,...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... ## Elements of Trigonometry, Plane and Spherical: With The Principles of ...

John Wright (Mathematician) - Perspective - 1772 - 251 pages
...fuppofed to be divided into 360 equal parts, called degrees; each degree ifr fuppofed to be divided into 60 equal parts, called minutes ; and each minute into 60 equal parts, called feconds, &c. 5. Any angle HRB at the centre of a circle, is faid to be an angle of as many degrees,... ## The Elements of Euclid, Viz: The Errors, by which Theon, Or Others, Have ...

Robert Simson - Trigonometry - 1775 - 520 pages
...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... 