 | Mrs. L. H. Tyler - 1837 - 302 pàgines
...a circle. (21.) DBF. 4. Every circle, from the smallest to the largest, is conceived 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. These divisions are usually expressed by signs... | |
 | Thomas Kerigan - 1838 - 804 pàgines
...hemisphere, and the other, the southern hemisphere. — The equator, like all other great circles, is divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes ; each minute into , 60 equal parts, called seconds, and so on. The Meridian of any place on the earth is... | |
 | Thomas Holliday - 1838 - 404 pàgines
...opening or inclination to each other. 2. 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 again into 60 equal parts, called seconds. The angles are measured by the number of... | |
 | Thomas Keith - 1839 - 498 pàgines
...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 parts called seconds. The angles are measured by the number of degrees cut from... | |
 | Charles Davies - 1839 - 376 pàgines
...accuracy. 41. For the purposes of trigonometrical calculations, the circumference of the 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. PLANE TRIGONOMETRY. V As the circumference of... | |
 | Charles Davies - 1839 - 376 pàgines
...accuracy. 41. For the purposes of trigonometrical calculations, the circumference of the 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. PLANE TRIGONOMETRY \ As the circumference of a... | |
 | J. David Parkes - 1839 - 222 pàgines
...Aquarius, and X Pisces, which are called the twelve signs of the Zodiac. Each sign is divided into 30 equal parts, called degrees, each degree into 60 equal parts, called minutes, and each minute into 60 seconds, and so on to thirds, fourths, fifths, &c. Abréviations. — * Sextile;... | |
 | Augustus De Morgan - 1840 - 182 pàgines
...radius, very nearly. Multiply the square of the radius by 3-1415927. * The right angle is divided into 90 equal parts called degrees, each degree into 60 equal parts called minutes, and each minute into 60 equal parts called seconds. Thus, 2° 15' 40" means 2 degrees, 15 minutes,... | |
 | Charles Davies - 1835 - 388 pàgines
...accuracy. 41. For the purposes of trigonometrical calculations, the circumference of the 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. PLANE TR16ONOMETRY. As the circumference of a... | |
 | John Hymers - 1841 - 244 pàgines
...certain angle fixed upon as the unit of angular measure. For this purpose we divide a right angle into 90 equal parts called degrees, each degree into 60 equal parts called minutes, each minute into 60 equal parts called seconds ; then an angle is expressed by the number of degrees, minutes,... | |
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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. 
