Books Books 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. An Elementary Geometry and Trigonometry - Page 11
by William Frothingham Bradbury - 1873 - 238 pages ## A New System of Geography: Ancient and Modern : for the Use of Schools ...

Jedidiah Morse, Sidney Edwards Morse - Geography - 1826 - 342 pages
...divide the globe into two unequal parts. The two tropics and the two polar circles are less circles. Every circle is divided into 360 equal parts, called degrees ; each degree is divided into 60 minutes ; and each minute into 60 seconds. They are marked thus 32° 14' 26" ; that... ## The New American Practical Navigator: Being an Epitome of Navigation ...

Nathaniel Bowditch - Nautical astronomy - 1826 - 710 pages
...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... ## An Introduction to the Theory and Practice of Plain and Spherical ...

Thomas Keith - Navigation - 1826 - 508 pages
...the arc DE is the measure of the angle ABC. (H) The circumference of every circle is supposed to be divided into 360 equal parts called degrees, each degree into 60 equal parts called minutes, each minute into 60 equal parts called seconds. The angles are measured by the number of degrees cut... ## The New American Practical Navigator: Being an Epitome of Navigation ...

Nathaniel Bowditch - Nautical astronomy - 1826 - 782 pages
...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 - Geometry - 1827 - 458 pages
...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... ## The Elements of Euclid: The Errors by which Theon, Or Others, Have Long ...

Robert Simson - Trigonometry - 1827 - 513 pages
...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, &c. And as many degrees, minutes, seconds, &c. as are contained in any arch, of so many degrees, minutes,... ## An introduction to modern geography

James Thomson - 1827 - 1014 pages
...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 New American Grammar of the Elements of Astronomy: On an Improved Plan ...

James Ryan - Astronomy - 1827 - 408 pages
...is called an arc; and one-fourth, of the circumference of a circle is usually called a quadrant. 16. The circumference of every circle is divided into 360 equal parts, called degrees ; and of which the symbol is 12° or 7°, if 12 or 7 be their number. Each degree is also divided into... ## Elements of Geometry and Trigonometry: With Notes

Adrien Marie Legendre - Geometry - 1828 - 346 pages
...For the purposes of trigonometrical calculations, the circumference of the circle is conceived to be divided into 360 equal parts, called degrees ; each...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... 