 | Joseph Harris - 1732 - 236 σελίδες
...Pole is placed, and the opppfite one is the Southern Hemifphere. The Aftronomers divide all Circles into 360 equal Parts called 'Degrees, each Degree...60 equal Parts called Minutes, each Minute into 60 Seconds, &c. But befides this Divifion into Degrees, the Equir noftial is commonly divided into 24... | |
 | Benjamin Donne - 1796 - 120 σελίδες
...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...parts, called minutes ; each minute into 60 equal parts named feconds, &c. Ar. B. Sometimes the circumference of a circle is called a circle; as when it is... | |
 | William Taylor (teacher of the mathematics.) - 1800 - 556 σελίδες
...called a' femi-eircle • half the diameter is called the Radius. 8. The circumference of every circle is divided into 360 equal parts called Degrees ; each degree into 60 equal parts, called Minutes ; and each minute into 60 equal parts, called Seconds, &c. Any part of the the circumference is called... | |
 | John Bonnycastle - 1806 - 464 σελίδες
...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...; each minute into 60 equal parts, called seconds ; &c. So that a semicircle, or half the circumference, contains 1 80 degrees ; and a quadrant, or fourth... | |
 | 1808 - 290 σελίδες
...Ecliptic. This circle we suppose to be divided into 12 equal parts, called Signs ; each sign . into 30 equal parts, called Degrees ; each degree into 60 equal parts called Minutes ; and every minute into 60 equal parts, called Seconds; so that a second is the 60th part of a minute... | |
 | James Ferguson - 1809 - 574 σελίδες
...ecliptic. tic. This circle we suppose to be divided into 12 equal parts, called signs ; each sign into 30 equal parts, called degrees; each degree into 60 equal parts, called minutes; and each minute into 60 into 60 equal parts, called seconds : so that a second Plate I. is the 60th... | |
 | Thomas Keith - 1810 - 478 σελίδες
...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...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 Keith - 1811 - 388 σελίδες
...year 1804, was 13° 14' 43" and its declination 80° "15' 44" north. $ Every circle is supposed to be divided into 360 equal parts, called degrees ; each...; each minute into 60 equal parts called seconds, &c. ; a degree is, therefore, only a relative idea, and not an absolute quantity, except when applied... | |
 | Francis Nichols - 1811 - 162 σελίδες
...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 - 462 σελίδες
...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... | |
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For the purpose of measuring angles, the circumference is divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes ; each minute into 60 equal parts called seconds. 
