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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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The New American Practical Navigator: Being an Epitome of Navigation ...

Nathaniel Bowditch - 1826 - 617 páginas
...small, are supposed to have th cumference divided into 360 equal parts, called degrees, and each deçr 60 equal parts, called minutes ; and each minute into 60 equal parts. seconds, and so on into thirds, fourths,* be. and an arch is said to bi many degrees as it contains...
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The Elements of Euclid: The Errors by which Theon, Or Others, Have Long ...

Robert Simson - 1827 - 513 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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An introduction to modern geography

James Thomson - 1827
...circle be divided into 360 equal parts, each of them is called a degree. Each degree is subdivided into 60 equal parts, called minutes; and each minute into 60 equal parts, called * Geography is a description of the earth ; and is distinguished by different names, according to tha...
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A Treatise on Surveying: Containing the Theory and Practice: to which is ...

John Gummere - 1828 - 216 páginas
...determined. 2. The periphery of every circle is supposed to be divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes ;...minute into 60 equal parts, called seconds, &c. 3. The measure of an angle is the arc of a circle, contained between the two lines that form the angle,...
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Elements of Geometry and Trigonometry: With Notes

Adrien Marie Legendre - 1828 - 316 páginas
...calculations, the circumference of the circle is conceived to be divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes; and each minute into 60 equal parts, called seconds. The semicircumference, or the measure of two right angles, contains 180 degrees; the quarter of the...
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The Common School Manual: A Regular and Connected Course of Elementary ...

Montgomery Robert Bartlett - 1828
...The circumference of every circle, is supposed to be divided into 360 equal parts, called degrees; each degree into 60 equal parts called minutes; and each minute into 60 equal parts, called seconds; and these into thirds, &c. Now, as all circles are not of the same magnitude, and as they are all divided...
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Elements of Geometry: Being Chiefly a Selection from Playfair's Geometry

John Playfair - 1829 - 186 páginas
...will be the proper measure of the angle BGC. Mathematicians suppose the circumference of every circle to be divided into 360 equal parts, called degrees,...equal parts, called minutes, and each minute into £0 equal parts, called seconds, &c. Hence a right angle, being measured by a quadrant contains 90...
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A System of Geometry and Trigonometry: With a Treatise on Surveying ... in ...

Abel Flint - 1830 - 284 páginas
...divides the circle into two equal parts, called semicircles ; as AB or DE. Fig. 5. 14. 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, &c . NOTE. Since all circles are divided into the same number of degrees,...
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Elements of Surveying: With the Necessary Tables

Charles Davies - 1830 - 300 páginas
...calculations, the circumference of the circle is supposed to be divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes ;...and each minute into 60 equal parts, called seconds. 26. As the circumference of a circle may be regarded as a proper measure of angles, having their vertices...
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A System of Natural Philosophy: In which the Principles of Mechanics ...

John Lee Comstock - 1831 - 295 páginas
...near the star a. Each of the 12 signs of the zodiac is divided into 30 smaller partSj called degrees; each degree into 60 equal parts, called minutes, and each minute into 60 parts, called seconds. The division of the zodiac into signs, is of very ancient date, each sign having...
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