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" 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 Treatise on Practical Surveying: Which is Demonstrated from Its First ... - Página 95
por Robert Gibson - 1818 - 478 páginas
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Elements of Trigonometry, Plane and Spherical: With The Principles of ...

John Wright (Mathematician) - 1772 - 251 páginas
...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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The Elements of Euclid, Viz: The Errors, by which Theon, Or Others, Have ...

Robert Simson - 1775 - 520 páginas
...meafure of the 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...
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The Geometrician: Containing Essays on Plane Geometry, and Trigonometry ...

Benjamin Donne - 1775 - 159 páginas
...Semicircle, or 2 Rt. ¿.s, and 90 Degrees a Quadrant, or Rt L. j) each Degree is fuppofed to be divided into 60 equal Parts, called Minutes, and each Minute into 60 equal Parts, called Seconds, &c. Hence it is plain, that in une' qual Circles, as well as in equal, equal Angles are fubtended by an...
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The First Six Books: Together with the Eleventh and Twelfth

Euclid - 1781 - 520 páginas
...co-fucant of the angle rtionai between the tan.ngles HKB, ABC will \.E arc right ; therefore rill• 360 equal parts called degrees, and each degree into...minutes, and each minute into 60 equal parts called feconds, &c- And as many degrees, minutes, feconds, &c. as are contained in any arch, of fo many degref.s...
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The Practical Navigator, and Seaman's New Daily Assistant. ...

John Hamilton Moore - 1791 - 296 páginas
...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 Minute into 60 equal Parts called Seconds, &c. A Semicircle is 180 Degrees, and a Quadrant contains 90 Degrees. A Right Angle contains 90 Degrees...
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A Complete Treatise on Practical Mathematics: Including the Nature and Use ...

John McGregor (teacher of mathematics.) - 1792 - 431 páginas
...It is divided into right-angled and oblique-angled trigonometry. The circumference of any circle, is divided into 360 equal parts, called degrees, and...minutes, and each minute into 60 equal parts, called féconds, and fo on. JVi/f, Degrees are frequently marked °, and minutes '. Thus, 30 degrees, 14 minutes,...
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Trigonometry, Plane and Spherical: With the Construction and Application of ...

Thomas Simpson - 1799 - 79 páginas
...fuppofed divided into fome affigned number of equal parts. 2. The periphery of every circle is fuppofed to be divided into 360 equal parts, called degrees...minutes; and each minute into 60 equal parts, called feconds, or fecond minutes, &c. ' B a 3- Any HK/ 3. Any part AB of the periphery of the circle is called...
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A Complete System of Practical Arithmetic, with Various Branches in the ...

William Taylor (teacher of the mathematics.) - 1800 - 519 páginas
...called the Radius. 8. The circumference of every circle is divided into 360 equal parts called Degrees ; each degree into 60 equal parts, called Minutes ;...each minute into 60 equal parts, called Seconds, &c. Any part of the the circumference is called an Arch. 9. The Chord of an arch, is a right line joining...
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A System of Geometry and Trigonometry: Together with a Treatise on Surveying ...

Abel Flint - 1804 - 168 páginas
...it divides the Circle into two equal parts, called Semicircles ; as AB or DE. 14. The. Circumference of every Circle is supposed to be Divided into 360...and each Minute into 60 equal parts, called Seconds ; jktl these into Thirds, &c. Ifote. .-Since all Circles are divided into the same number of Degrees,...
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The Elements of Euclid: Also the Book of Euclid's Data ...cor. viz. The ...

Robert Simson - 1804
...; the arch AC is called the meafure of the angle ABC. II. The circumference of a circle is fuppofed to be divided into 360 equal parts called degrees,...minutes, and each minute into 60 equal parts called feconds, &c. And as many degrees, minutes, feconds, &c. as are contained in any arch, of fo many degrees,...
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