 | Charles Davies - Arithmetic - 1846 - 399 pages
...OF TIME. 40. 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. For astronomical purposes, the circumference of the circle is also supposed to be divided into 12 equal... | |
 | Henry Hopwood - 1846 - 250 pages
...English mathematicians, to be divided into 360 equal parts, called degrees; each degree is subdivided into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds. Degrees are marked (°), minutes ('), and seconds ("). These degrees vary in length according to the... | |
 | Mary Somerville - Physical sciences - 1846 - 506 pages
...NOTE 50, p. 9.— Ninety degrees. A circle is divided into 360 equal parts, or degrees ; each degree into 60 equal parts, called minutes; and each minute into 60 equal pans, called seconds. It is usual to write these quantities thus, 15° 16' 10", which means fifteen... | |
 | Anthony Nesbit - Plane trigonometry - 1847 - 426 pages
...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. 40. The diameter of a circle is a right line drawn through the centre, and terminating in the circumference... | |
 | James Robinson (of Boston.) - 1847 - 302 pages
...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. Hence, a semicircle measures 180 degrees, and a quadrant 90 degrees. 46. The measure of an angle is... | |
 | Charles Davies - Trigonometry - 1849 - 384 pages
...calculation, the circumference of the circle is divided into 360 equal parts, called •legrees; each degree into 60 equal parts, called minutes; and each minute into 60 equal parts, called seconds. nated by the characters : °,',": thus the expression 16° 6' 15" represents an arc, or an angle, of... | |
 | Rufus Putnam - Arithmetic - 1849 - 404 pages
...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. Hence, a semicircle contains 180 degrees, and a quadrant, 90 degrees. 46. AN ELLIPSE is an oval figure,... | |
 | Mary Somerville - Physical sciences - 1849 - 570 pages
...sun. NOTE 50, p. 11. Ninety degrees. A circle is divided into 360 equal parts, or degrees; each degree into 60 equal parts, called minutes; and each minute into 60 equal parts, called seconds. It is usual to write these quantities thus, 15° Ki' Id", which means fifteen degrees, sixteen minutes,... | |
 | Daniel Adams - Arithmetic - 1849 - 142 pages
...10. 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. 11. Degrees, minutes, and seconds, are marked respectively °, ', "; they are used in mensuration and... | |
 | Charles Guilford Burnham - 1850 - 352 pages
...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 ; and these into thirds, etc. Hence a semicircle contains 180 degrees, and a quadrant 90 degrees. 15.... | |
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Every circumference of a. circle, whether the circle be large or small, is supposed to be divided into 360 equal parts called degrees. Each degree is divided into 60 equal parts called minutes, and each minute into 60 equal parts called seconds. 
