 | Thomas Keith - 1817 - عدد الصفحات: 306
...thus the arc DE is the measure of the angle » BE, and the arc G n is the measure of the angle ABC. 14. 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.... | |
 | Nathaniel Dwight - 1817 - عدد الصفحات: 228
...Circles, which divide it into Unequal parts. Q. What are the Degrees of a Circle ?. A. The circumferer.ee 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 seconds. Q. What is... | |
 | Charles Hutton - 1818 - عدد الصفحات: 646
...the middle. Thus the angle contained by the lines BA and 3D is called the angle BAC BAD or DAB. 67. The circumference of every circle is supposed to be...equal parts, called Degrees : and each degree into 60 Minutes, each minute into 60 Seconds, and so on. Hence a semicircle contains 180 degrees, and a quadrant... | |
 | William Nicholson - 1819 - عدد الصفحات: 414
...otherwise called a periphery ; the boundary of a right lined figure being expressed by the term perimeter. The circumference of every circle is supposed to be divided into 360 degrees. The angle at the circumference of a circle is double that at the centre. For the ratio of... | |
 | William Hawney - 1820 - عدد الصفحات: 336
...thus the arch I)E is the measure of the angle DBE aud the arch GH is the measure of the angle ABC. 1*. 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.... | |
 | Robert Gibson - 1821 - عدد الصفحات: 594
...circumference into two equal parts, called semicircles; and is double theradius,as AB or DE. fig. 8. 16. The circumference of every circle is supposed to be...60 equal parts called minutes, and each minute into 00 equal parts called seconds, and- these into thirds, fourths, &c. these parts being greater or less... | |
 | Bewick Bridge - 1821 - عدد الصفحات: 648
...For the purpose of exhibiting arithmetically the magnitude of angles, the whole circumference of the 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.... | |
 | Edward Bruce (bookseller.) - 1821 - عدد الصفحات: 418
...the centre. / 1. A less circle divides a globe into two unequal parts. Every circle, great or small, is supposed to be divided into 360 equal parts, called degrees; and every degree is subdivided into 60 minutes. Degrees are marked °, and minutes'. Thus,—4 deg. 15... | |
 | Sidney Edwards Morse - 1822 - عدد الصفحات: 706
...diameter is a straight line drawn through the centre from one side of the circumference to the other. 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 part of its circumference.... | |
 | Joseph Emerson Worcester - 1822 - عدد الصفحات: 354
...ecli^tc, and the two colurvs. equal parts. These are four, the two tropics, and (he two polar circles. 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 00 equal parts, called seconds.... | |
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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. 
