 | Charles Davies - 1886 - 352 páginas
...Definitions. 28 The circumference of a circle is used for the measure. ment of angles. For this purpose it is divided into 360 equal parts called degrees, each...parts called minutes, and each minute into 60 equal pans called second s. The degrees, minutes, and seconds are marked thus ° ' " ; and 9° 18' 16", are... | |
 | William Findlay Shunk - 1886 - 376 páginas
...inclndes one-quarter of the circle, and is the measure of a right angle. Each degree is further divided into 60 equal parts called minutes, and each minute into 60 equal parts called seconds. Degrees, minutes, and seconds are denoted by the symbols °, 1, ": thus the expression 7° 221 33"... | |
 | George Albert Wentworth - 1886 - 392 páginas
...about a point in a plane 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. Likewise the circumference of a circle is divided into 3GO equal arcs, each corresponding to an angle... | |
 | M. P. Caldwell - 1883 - 198 páginas
...is used in estimating latitude and longimde, and also in measuring the motions of heavenly bodies. The circumference of every circle is supposed to be divided into 360 degrees. TIME. 60 Seconds (sec.) make 1 Minute, marked m. 60 Minutes " 1 Hour, " hr. 24 Hours " 1 Day,... | |
 | Nathaniel Bowditch - 1888 - 704 páginas
...small, are supposed to have their circumference 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 so on into thirds, fourths, Jtc. ; and an arc is said to be of as many degrees as it contains... | |
 | Horatio Nelson Robinson - 1888 - 372 páginas
...sjiits containing 9 yd. 2 qr. each ; how many suits did he make ? Ans. 1 7. LONGITUDE AND TIME. 224. Every circle is supposed to be divided into 360 equal parts, called degrees. Since the sun appears to pass from east to west round the earth, or through 360°, once in every 24... | |
 | Nathan Fellowes Dupuis - 1889 - 370 páginas
...practical purposes the right angle is divided into 90 equal parts called degrees ; each degree is divided into 60 equal parts called minutes ; and each minute into 60 equal parts called seconds. 20 seconds and six-sevenths of a second, follows : — 51° 25' 42f . This is denoted as Theorem. —... | |
 | William Findlay Shunk - 1890 - 360 páginas
...includes one-quarter of the circle, and is the measure of a right angle. Each degree is further divided into 60 equal parts called minutes, and each minute into 60 equal parts called seconds. Degrees, minutes, and seconds are denoted by the symbols °, ', ": thus the expression 7° 22' 33"... | |
 | Charles Haynes Haswell - 1890 - 990 páginas
...right line that touches a circle without cutting it. Cotangent is tangent of complement of arc. • ii Circumference of every circle is supposed to be divided into 360 equal parts, termed Degrees ; each degree into 60 Minutes, and each minute into 60 Seconds, and so on. Complement... | |
 | Isaac Hammond Morris - 1890 - 440 páginas
...PROBLEM 24. — To construct an angle containing a given number of degrees. The circumference of a circle is supposed to be divided into 360 equal parts, called degrees. The radius of a circle may be set off exactly six times round the circumference ; hence, if an arc... | |
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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. 
