| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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,... | |
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