 | Thomas Keith - 1810 - عدد الصفحات: 478
...the 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...minutes, each minute into 60 equal parts called seconds. The angles are measured by the number of "egrees cut from the circle by the lines which form the B... | |
 | Thomas Simpson - 1810 - عدد الصفحات: 168
...about 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, called minutes ; and each minute into 60 equal parts, called... | |
 | Euclid - 1810 - عدد الصفحات: 554
...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,... | |
 | Francis Nichols - 1811 - عدد الصفحات: 162
...the other circle, subtending the same angle ABC. 5. COR. 4. Hence, if a circle of any radius whatever be divided into 360 equal parts, called degrees, each...into 60 equal parts, called minutes; each minute into 6O equal parts, called seconds, &c., the number of degrees, minutes, and seconds, intercepted by two... | |
 | Edward Augustus Kendall - 1811 - عدد الصفحات: 462
...measured by the arcs of a circle, contained between the two legs, having the angular point for its centre. Ev.ery circle is supposed to be divided into 360 equal...parts, called degrees ; each degree into 60 equal parti, called minutes $ each minute into' 60 equal parts, called seconds. " An angle is said to be... | |
 | Robert Gibson - 1811 - عدد الصفحات: 580
...parts, called semicircles ; and is double the radius, as AB or DE. fig. 8. m *!6. 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 caled seconds,... | |
 | Edward Augustus Kendall - 1811 - عدد الصفحات: 476
...: -. Every circle is supposed to be divided into 369 equal parts, called degrees ; each degree iuto 60 equal parts, called minutes ; each minute into 60 equal parts, called seconds. An angle is said to be of as many degrees, minutes, seconds, &c. as arc contained in the arc, ov part... | |
 | Friedrich Christian Accum - 1813 - عدد الصفحات: 488
...the circumference of a circle is the standard of comparison. This circle, of whatever size it may be, is supposed to be divided into 360 equal parts, called degrees ; each degree is again subdivided into 60 equal parts, called minutes, and every minute is subdivided into 60 seconds... | |
 | John Gummere - 1814 - عدد الصفحات: 398
...plane triangle, except the three angles, are given, the others are determined. 2. The periphery of every circle is supposed to be divided into 360 equal...; each degree into 60 equal parts, called minutes ; and each minnte into 60 equal parts, called seconds, &c. 3. The measure of an angle is the arc of... | |
 | Jedidiah Morse - 1814 - عدد الصفحات: 696
...equal to two radii, or the longest straight line, that can be drawn in a circle. The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; each degree into 60 minutes ; each minute into 60 seconds. An arc of a circle is the measure of an angle. Thus a right... | |
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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. 
