| Mrs. L. H. Tyler - 1837 - 288 páginas
...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
...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 - 80 páginas
...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
...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 - 261 páginas
...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 - 261 páginas
...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
...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 - 162 páginas
...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 - 359 páginas
...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 - 151 páginas
...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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