| Joseph Harris - Astronomical models - 1732 - 258 pages
...Pole is placed, and the opppfite one is the Southern Hemifphere. The Aftronomers divide all Circles **into 360 equal Parts called 'Degrees, each Degree into 60 equal Parts called Minutes, each Minute** into 60 Seconds, &c. But befides this Divifion into Degrees, the Equir noftial is commonly divided... | |
| Thomas Simpson - Geometry - 1760 - 300 pages
...the degrees, and parts of a degree, contained therein ; each degree being conceived to be fubdivided **into 60 equal parts, called minutes ; each minute again into 60 equal parts, called** feconds ; and fo on to thirds, fourths, fifths, &c. at plcafure. THEOREM II. • Any chord (AB) of... | |
| Benjamin Donne - 1796 - 118 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...into 60 equal parts, called minutes ; each minute** into 60 equal parts named feconds, &c. Ar. B. Sometimes the circumference of a circle is called a circle;... | |
| William Taylor (teacher of the mathematics.) - Arithmetic - 1800 - 519 pages
...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 - Trigonometry - 1806 - 464 pages
...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...into 60 equal parts, called minutes ; each minute** into 60 equal parts, called seconds ; &c. So that a semicircle, or half the circumference, contains... | |
| Astronomy - 1808 - 272 pages
...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 - Astronomy - 1809 - 533 pages
...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 - Navigation - 1810 - 482 pages
...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 by the number of "egrees cut from the circle... | |
| Francis Nichols - Plane trigonometry - 1811 - 128 pages
...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...degree into 60 equal parts, called minutes; each minute** into 6O equal parts, called seconds, &c., the number of degrees, minutes, and seconds, intercepted... | |
| Thomas Keith - Astronomy - 1811 - 386 pages
...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...degree into 60 equal parts called minutes ; each minute** into 60 equal parts called seconds, &c. ; a degree is, therefore, only a relative idea, and not an... | |
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