| Philip Ronayne - Algebra - 1717 - 478 pages
...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... | |
| Edmund Stone - Compasses (Mathematical instruments) - 1721 - 60 pages
...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... | |
| Archibald Patoun - Navigation - 1734 - 414 pages
...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;... | |
| Edmund Stone - Mathematical instruments - 1746 - 62 pages
...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^... | |
| 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 Degree into 60** equal Parts, called Minutes ; and each Minute into 60 equal Parts, called Seconds, or fecond Minutes,... | |
| 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 Degree into 60** equal Parts, called Minutes ; and each Minute into 60 equal Parts, called Seconds, &c. Any Portion... | |
| Charles Hutton - Measurement - 1788 - 728 pages
...point is read in the middle. 56. The circumference of every circle is fuppofed to be divided into 3 60 **equal parts, called degrees; and each degree into 60 minutes, each minute into 60** feconds, and fo on. Hence a femicircle contains 1 80 degrees, and a quadrant 90 degrees. 57. The meafureofa... | |
| John Hamilton Moore - Nautical astronomy - 1791 - 296 pages
...Degree is the ßooth Part of the Circumference of any Circle. All Circles, whether great or fmall, are **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, &c. A Semicircle... | |
| John McGregor (teacher of mathematics.) - Mathematics - 1792 - 431 pages
...It is divided into right-angled and oblique-angled trigonometry. The circumference of any circle, is **divided into 360 equal parts, called degrees, and each degree into 60** equal parts, called minutes, and each minute into 60 equal parts, called féconds, and fo on. JVi/f,... | |
| Robert Gibson - Surveying - 1795 - 319 pages
...; and is double the Radius, as AB cr DE. Fig. 8. 1 8. 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, and each Minute into 60 equal Parts called Seconds, and thefe into Thirds,... | |
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