 | Thomas Keith - 1839 - 498 pages
...thus the arc ac is the measure of the angle aBc, and the arc DE is the measure of the angle ABC. (56) 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... | |
 | Benjamin Greenleaf - Arithmetic - 1841 - 334 pages
...middle. Thus, the angle contained by the lines B, A and A, D is called the angle B, A, D, or D, A, B. 56. The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 minutes, each minute into 60 seconds ; and so... | |
 | Charles Guilford Burnham - Arithmetic - 1841 - 324 pages
...passing through the centre ; and it divides the circle into two equal parts, called semi-circles. 14. The circumference of every circle is supposed to be divided into 360 equal parts, called degrees; and each degree into 0O equal parts, called minutes; and each minute into... | |
 | William Grier - Mechanical engineering - 1842 - 320 pages
...on the two sides, 5 AO that which stands at the angular point is read in the middle. Thus, DAE. 57. The circumference of every circle is supposed to be divided into 360 equal parts, called degrees; and each degree into 60 minutes, each minute into 60 seconds, and so on.... | |
 | Samuel Maunder - Encyclopedias and dictionaries - 1843 - 914 pages
...compasses, fixing one foot in the centre and turning the other round to trace out the circumference. The circumference of every circle is supposed to be divided into 360 equal parts, called degrees and marked ° ; and each degree into 60 mi nutes, marked'. The word Circle... | |
 | Joseph Emerson Worcester - Classical geography - 1844 - 356 pages
...globe. One is the north, and the other the south pole ; and they are each 90 degrees from the equator. The 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... | |
 | Enoch Lewis - Conic sections - 1844 - 234 pages
...What an arc lacks of a semicircle, is called its supplement. Thus BHD is the supplement of AB. 10. 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... | |
 | Robert Griffith Hatfield - Architecture - 1845 - 326 pages
...abd, (see note to Art. 27,) then each of the two angles is called a right angle. 131. — Definition. The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; hence a semi-circle contains 180 degrees, a quadrant 90, &c. o Fig. 96.... | |
 | John Hunter (of Uxbridge.) - 1847 - 266 pages
...the Gregorian scheme is called, is now 12 days before the Old or Julian Style. ANGULAR MEASURE.—The circumference of every circle is supposed to be divided...60 minutes (60'), and each minute into 60 seconds (60")The French divide the circle differently, making the grade, or degree, the 400th part of a circle,... | |
 | James Robinson (of Boston.) - 1847 - 304 pages
...circumference for its arc, and the diameter for its chord. The half circle FGH is a semicircle. 45. The 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... | |
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The 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. 
