 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 60 equal parts, called seconds.  Putnam's Arithmetic - Σελίδα 214των Rufus Putnam - 1849 - 264 σελίδεςΠλήρης προβολή - Σχετικά με αυτό το βιβλίο
 | Sidney Luxton Loney - 1905 - 332 σελίδες
...inconvenient unit of measurement on account of its size. We therefore subdivide a right angle into 90 equal parts called degrees, each degree into 60 equal...and each minute into 60 equal parts called seconds. The symbols used for a degree, a minute, and a second are 1°, 1', and 1". Thus 10° 11' 12" means... | |
 | William A. Radford - 1907 - 332 σελίδες
...divided by mathematicians into 360 equal parts, called degrees ; each degree being again subdivided into 60 equal parts, called minutes, and each minute into 60 equal parts called seconds. Hence, it follows that the arc of a quarter circle or quadrant includes 90 degrees; that is, one-fourth part... | |
 | 1907 - 710 σελίδες
...measuring arc is a part is 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. The magnitude of an angle is then expressed by the number of degrees, minutes, and seconds that its... | |
 | Henry Sinclair Hall - 1908 - 286 σελίδες
...which it is perpendicular to AB. (ii) All right angles are equal. A right angle is divided into 90 equal parts called degrees (°) ; each degree into 60 equal parts called minutes (') ; each minute into 60 equal parts called seconds ("). In the above figure, if OC revolves about... | |
 | George E. Mercer - 1909 - 312 σελίδες
...circumference is an arc. A to B and B to C are arcs. The circumference of every circle is divided into 300 equal parts called degrees, each degree into 60 equal...and each minute into 60 equal parts called seconds. jJ5 of a circumference is called 1 degree of arc. J of a circumference, or 90 degrees, is called a... | |
 | William A. Radford, Alfred Sidney Johnson - 1909 - 384 σελίδες
...divided by mathematicians into 360 equal parts, called degrees ; each degree being again subdivided into 60 equal parts, called minutes, and each minute into 60 equal parts called seconds. Hence, it follows that the arc of a quarter circle or quadrant includes 90 degrees; that is, one-fourth part... | |
 | Nehemiah Hawkins - 1909 - 714 σελίδες
...parts. Defray. — To pay or discharge ; to provide for ; as, a charge, debt or expense. Degrees. — The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; thus, a degree la jin of the circumference of any circle. A degree is divided into 00 parts called... | |
 | Eugene Randolph Smith - 1909 - 204 σελίδες
...numerical calculations, a perigon is 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. 73. How many degrees are there in an interior angle of a regular polygon of 15 sides? of n-sides? 74.... | |
 | 1912 - 558 σελίδες
...degrees, ie, it is =i of a circumference. In order to obtain accurate measurements each degree is divided into 60 equal parts called minutes and each minute into 60 equal parts called seconds. f65\ {BO /OS F1 g - 6L Angular Measurement SOLIDS A solid has three dimensions—length, breadth, and... | |
 | Eugene Randolph Smith - 1909 - 424 σελίδες
...How many sides has the polygon each of whose interior angles is six sevenths of a straight angle ? 60 equal parts called minutes, and each minute into 60 equal parts called seconds. 73. How many degrees are there in an interior angle of a regular polygon of 15 sides? of n-sides? 74.... | |
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