 | Anthony Nesbit - Plane trigonometry - 1847 - 492 pages
...certain point within it, called the centre. 39. The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; each...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 - 304 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... | |
 | Daniel Adams - Arithmetic - 1849 - 142 pages
...sixth part of a circle. Thus, AFB, BFC, and CFD, are sextants. 10. The circumference of every circle is divided into 360 equal parts, called Degrees; each...and each minute into 60 equal parts, called Seconds. 11. Degrees, minutes, and seconds, are marked respectively °, ', "; they are used in mensuration and... | |
 | Rufus Putnam - Arithmetic - 1849 - 402 pages
...and a semicircle ; as, the surface к FH К. 45. The CIRCUMFERENCE of every circle is supposed to be divided into 360 equal parts, called degrees ; each...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 - 568 pages
...distance from the 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,... | |
 | Charles Davies - Trigonometry - 1849 - 372 pages
...trigonometrical 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... | |
 | Charles Davies - Geometry - 1850 - 218 pages
...semicircumference ; and one quarter of the circumference, as AC, is called a quadrant. D D BC D BC B ~BC GEOMETRY. Definitions. 28. The circumference of a circle is...If through the point of division marked 40, we draw CEy then, the angle ECB will be equal to 40 degrees. If CF were drawn through the point of division... | |
 | Charles Davies - Geometry - 1850 - 238 pages
...is called a semicircumferen.ee ; and one quarter of the circumference, as AC, is called a quadrant. Definitions. 28. The circumference of a circle is...be divided into 360 degrees, beginning at the point If. If through the point of division marked 40, we draw CE, then, the angle ECB will be equal to 40... | |
 | Daniel Adams - Measurement - 1850 - 144 pages
...sixth part of a circle. Thus, AFB, BFC, and CJRD, are sextants. 10. The circumference of every circle is divided into 360 equal parts, called Degrees ;...and each minute into 60 equal parts, called Seconds. 11. Degrees, minutes, and seconds, are marked respectively °, ', " ; they are used in mensuration... | |
 | Charles Davies - Arithmetic - 1850 - 412 pages
...required ; and so of others. DIVISION OF THE CIRCLE MEASURE OF TIME. 40. Every circle is supposed to be divided into 360 equal parts called degrees, each...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... | |
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For this purpose it 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. The degrees, minutes, and seconds are marked thus ° ' " ; and 9° 18' 16", are read,... 
