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" 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. "
Putnam's Arithmetic - Σελίδα 214
των Rufus Putnam - 1849 - 264 σελίδες
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The New American Practical Navigator: Being an Epitome of Navigation ...

Nathaniel Bowditch - 1826 - 617 σελίδες
...or small, are supposed to have their circumference 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 so on into thirds, fourths,* be. and an arch is said to be. of as many degrees as it contains parts...

A New Treatise on the Use of the Globes: Or, A Philosophical View of the ...

Thomas Keith - 1826 - 334 σελίδες
...1820, is 14° 13' 7" ; and its declination 88° 20' 55" N. Connoissance des Terns, for 1820, p. 168. t Every circle is supposed to be divided into 360 equal parts called degrees ; each minute, into 60 equal parts called seconds, &c. : (a degree therefore is of different lineal extent,...

A New Treatise on the Use of Globes: With Notes and Observations, Containing ...

James M'Intire - 1826 - 215 σελίδες
...which the sun describes by his annual progress in the heavens. The ecliptic cuts the equator in an •The circumference of every circle is supposed to be divided into 360 equal jjarts, called degrees; each degree into sixty equal parts, called minutes; each minute into sixty...

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

Nathaniel Bowditch - 1826 - 617 σελίδες
...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...

Geometrical Problems Deducible from the First Six Books of Euclid: Arranged ...

Miles Bland - 1827 - 377 σελίδες
...angle (7.) Till lately. Geometers almost unanimously agreed to divide the circumference of the circle into 360 equal parts called Degrees ; each degree...and each minute into 60 equal parts called Seconds, &c. This method appeared to the Greek Geometers to afford some facilities for calculations, in consequence...

An elementary treatise on arithmetic, in theory and practice: adapted to the ...

James Ryan - 1827 - 272 σελίδες
...are there between the 17th of March and the 25th of December ? Ans. 283. Division of the Circle. 47. The circumference of every circle is supposed to be...into 360 equal parts called degrees — each degree is subdivided into 60 equal parts called minutes — each minute into 60 equal parts called seconds-^—...

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...

The Elements of Euclid: The Errors by which Theon, Or Others, Have Long ...

Robert Simson - 1827 - 513 σελίδες
...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 called degrees, and each degree into 60 equal parts called minutes, and each minute into 60 equal parts called seconds,...

The Common School Manual: A Regular and Connected Course of Elementary ...

Montgomery Robert Bartlett - 1828
...7. The right lines, A, C, I,, and B, C, E, divide the circle inUlour equal parts called quadrants. The circumference of every circle, is supposed to...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...

Elements of Geometry and Trigonometry: With Notes

Adrien Marie Legendre - 1828 - 316 σελίδες
...CIRCUMFERENCE. I. For the purposes of trigonometrical calculations, the circumference of the circle is conceived to be divided into 360 equal parts, called degrees...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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