 | Euclid - 1810 - 554 pages
...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, 8cc. as are contained in any arch, of so many degrees, minutes,... | |
 | Thomas Simpson - 1810 - 152 pages
...periphery of every circle is supposed to be divided into 36O equal parts, called degrees; and each degree into 60 equal parts, called minutes ; 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... | |
 | Abel Flint - 1813 - 212 pages
...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. Note. Since all Circles are divided into the same number of Degrees, a Degree... | |
 | Caleb Alexander - 1813 - 152 pages
...circumference of every circle, is supposed tobe divided into 360 equal parts, called degreeģ; and each degree, into 60 equal parts, called minutes; and each minute, into 60 equal parts, called seconds, and these into thirds, fourtUs, &c. 15 A figure, having three equal sides, is called an eqvilaterti... | |
 | Charles Butler - 1814 - 528 pages
...usual to divide the whole circumference into 360 equal parts called degrees, to subdivide each degree into 60 equal parts called minutes, and each minute into 60 equal parts called seconds, &c. wherefore, if an angle at the centre be subtended by an arc which consists of suppose 3O degrees, that... | |
 | Euclides - 1814 - 556 pages
...circumference of a circle is supposed to be divided into 360 equal part* 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,... | |
 | Robert Gibson - 1814 - 562 pages
...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 tiiese into thirds, fourths, &c. these parts being greater or less as the radius is.17. A chord... | |
 | Thomas Keith - 1817 - 306 pages
...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. The angles are measured by the number of degrees cut off from the circle, by the lines which form the... | |
 | Robert Gibson - 1818 - 500 pages
...periphery 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 ; &c. 3. Any part of the periphery, is calledlan arch; and is the measure of the angle at the centre, which... | |
 | Miles Bland - 1819 - 444 pages
...agreed to divide the circumference of the circle into 360 equal parts called Degrees ; each degree into 60 equal parts called Minutes ; 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... | |
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