| 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... | |
| 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... | |
| E. S. - Mathematical instruments - 1746 - 44 pages
...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... | |
| 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...Minutes ; 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... | |
| 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...Minutes ; 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... | |
| Thomas Simpson - Trigonometry - 1748 - 77 pages
...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...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 Circle is called an Arch,... | |
| 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,... | |
| 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,... | |
| 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,... | |
| 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, minutes, and... | |
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