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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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A Treatise of Practical Surveying: Which is Demonstrated from Its First ...

Robert Gibson - 1806 - 452 páginas
...parts called semicircles ; and is double the radius, as AB or DE. fig. 8. • 18. The circumference of every circle is supposed to be divided into 360...and each minute into 60 equal parts called seconds, and these into thirds, fourths, &c. these parts being greater or less as the radius is. 19. A chord...
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The Elements of Euclid: The Errors, by which Theon, Or Others, Have Long Ago ...

Robert Simson - 1806 - 518 páginas
...called the measure of th« angle ABC. n. The circumference of a circle is supposed to be divided info 360 equal parts called degrees, and each degree into...and each minute into 60 equal parts called seconds, i: >.. And as many degrees, minutes, seconds, &c. as are contained in any arch, of so many degrees,...
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The New Practical Navigator: Being a Complete Epitome of Navigation to which ...

John Hamilton Moore - 1807 - 328 páginas
...circles, whether great or fmall, are actually, or fuppofed to have, their circumference divided 11110360 equal parts, called degrees, and each degree into...minutes, and each minute into 60 equal parts, called féconds, and fu on into thirds, fourths, &c. All angles are msafurcd by an arch of a circle, defcribed...
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A System of Geometry and Trigonometry: Together with a Treatise on Surveying ...

Abel Flint - 1808 - 168 páginas
...equal parts, called Semicircles; asAB or DE. Fig. 5. 14. The Circumference of every Circle is supposcfl to be divided into 360 equal parts called Degrees...and each Minute into 60 equal parts, called Seconds ;. and these into Thirds, 8tc. Note. Since all Circles are divided into the same number of Degrees,...
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Elements of Geography: Designed for Young Students in that Science. In Seven ...

Benjamin Workman - 1809 - 191 páginas
...unequally. LeflVr circles are coai* monly parallel to fome great circle7. Every circle is fuppofed to be divided into 360 equal parts, called Degrees...and each degree into 60 equal parts, called Minutes ; each minute in 60 Seconds, £c. 8. A degree of a great circle, on the earth, contains 60 geographical...
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Astronomy Explained Upon Sir Isaac Newton's Principles: And Made Easy to ...

James Ferguson - 1809 - 533 páginas
...suppose to be divided into 12 equal parts, called signs ; each sign into 30 equal parts, called degrees; each degree into 60 equal parts, called minutes; and each minute into 60 into 60 equal parts, called seconds : so that a second Plate I. is the 60th part of a minute ; a minute...
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A Plain Elementary and Practical System of Natural Experimental Philosophy ...

John Ewing - 1809 - 538 páginas
...circle, whether large or small, is supposed to be divided into 360 equal parts, which are called degrees, each degree into 60 equal parts called minutes, and each minute into 60 seconds, and so on in a sixagesimal division as far as you please. If the earth be supposed to turn...
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Trigonometry, Plane and Spherical: With the Construction and Application of ...

Thomas Simpson - 1810 - 125 páginas
...requisite that the peripheries of circles, but also certain right lines in and about the circle be supposed divided into some assigned number of equal parts....and each minute into 60 equal parts, called seconds, or second minutes, &c. 3. Any part AB (fig. 1.) of t!u- periphery of the circle is called an arch,...
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The Elements of Euclid: Viz. the First Six Books, Together with the Eleventh ...

Euclid - 1810 - 518 páginas
...meeting BA, BC in A, C; the arch AC is called the measure of the angle ABC. II. The circumference of a circle is supposed to be divided into 360 equal parts...each minute into 60 equal parts called seconds, &c. And as many degrees, minutes, seconds, &c. as are contained in any arch, of so many degrees, minutes,...
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Trigonometry, Plane and Spherical: With the Construction and Application of ...

Thomas Simpson - 1810 - 125 páginas
...some assigned number of equal parts. 2. The periphery of every circle is supposed to be di-< vided into 360 equal parts, called degrees ; and each degree...and each minute into 60 equal parts, called seconds, or second minutes, &c. 3. Any part AB (fig. 1.) of the periphery of the circle is called an arch, and...
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