 | John Muller - Mathematics - 1769 - 152 pages
...angles they fubtend will be in the fame ratio. NB Mathematicians divide the circumference of a circle into 360 equal parts, called degrees, each degree into 60 minutes, and each minute into 60 feconds. Thefe divifions being marked on a femi-circle of brafs, or on an ivory rectangle, called protractor,... | |
 | Alexander Adam - 1794 - 748 pages
...is called an obttife angle; if lefs, an acute angle. The circumference of every circle is fuppofed to be divided into 360 equal parts, called degrees; each degree into 60 minutes i each minute into 60 feconds; and thcfe into thirds, fourths, &c. greater or lefs according to the... | |
 | Benjamin Donne - 1796 - 120 pages
...calculating the proportion which angles bear to each other, fuppofe the circumference of every circle to be divided into 360 equal parts, called Degrees ; each degree into 60 equal parts, called minutes : each minute into 60 equal parts njimedfeconds, &c. NB Sometimes the circumference... | |
 | Mathematics - 1801 - 446 pages
...which stands at the angular point, is read in the tmddle. X> A C 56. The 56. The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 minutes, each minute into 60 seconds, and so on. Hence a semicircle contains... | |
 | John Bonnycastle - Trigonometry - 1806 - 464 pages
...arc of a circle contained between its two legs, and having the angular point for its centre. 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; &c. So that a semicircle,... | |
 | John Aikin - Geography - 1807 - 442 pages
...circumference. 3. An arc 6f a circle is any part of the circumference. 4. 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.... | |
 | Thomas Keith - Navigation - 1810 - 478 pages
...measure of the angle aBC and 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... | |
 | Euclid - Geometry - 1810 - 554 pages
...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,... | |
 | Thomas Simpson - Trigonometry - 1810 - 168 pages
...the circle be supposed divided into some assigned number of equal parts. 2. The periphery of every circle is supposed to be divided into 360 equal parts, called degrees; and each degree into 60 equal parts, culled minutes ; and each minute into 60 equal parts, called seconds,... | |
 | Edward Augustus Kendall - 1811 - 462 pages
...arcs of a circle, contained between the two legs, having the angular point for its centre. * , 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. An angle is said to be... | |
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circumference, through the centre, to an opposite 188. The circumference of any circle is supposed to be divided into 360 equal parts, called Degrees, each degree into 60 Minutes, and each minute into 60 Seconds. TABLE. 60 seconds 
