| 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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