| Adrien Marie Legendre - Geometry - 1828 - 346 pages
...calculations, the circumference of the circle 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. The semicircumference, or the measure of two right angles, contains 180 degrees; the quarter... | |
| John Playfair - Geometry - 1829 - 186 pages
...measure of the angle BGC. Mathematicians suppose the circumference of every circle to be divided into **360 equal parts, called degrees, and each degree into...equal parts, called minutes, and each minute into** £0 equal parts, called seconds, &c. Hence a right angle, being measured by a quadrant contains 90... | |
| Abel Flint - Surveying - 1830 - 284 pages
...semicircles ; as AB or DE. Fig. 5. 14. The circumference of every circle is supposed to be divided into **360 equal parts, called degrees ; and each degree...minutes; and each minute into 60 equal parts, called** seconds ; and these into thirds, &c . NOTE. Since all circles are divided into the same number of degrees,... | |
| Charles Davies - Surveying - 1830 - 318 pages
...calculations, the circumference of the 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. 26. As the circumference of a circle may be regarded as a proper measure of angles, having... | |
| John Lee Comstock - Physics - 1831 - 314 pages
...near the star a. Each of the 12 signs of the zodiac is divided into 30 smaller partSj called degrees; **each degree into 60 equal parts, called minutes, and each minute into 60** parts, called seconds. The division of the zodiac into signs, is of very ancient date, each sign having... | |
| Joseph Allen - America - 1832 - 128 pages
...360 equal parts, called degrees, and each degree contains about 09 A miles. Each degree is divided **into 60 equal parts, called minutes, and each minute into 60 equal parts, called** seconds. Questions for Review. How many degrees are there in the circumference of the earth ? How many... | |
| Abel Flint - Geometry - 1835 - 366 pages
...semicircles ; as AB or DE. Fig. 5. 14. The circumference of every circle is supposed to be divided into **360 equal parts, called degrees ; and each degree...minutes ; and each minute into 60 equal parts, called** seconds ; and these into thirds, &c. NOTE. Since all circles are divided into the same number of degrees,... | |
| Euclid - 1835 - 540 pages
...called the measure of the angle ABC. II. The circumference of a circle is supposed to be divided into **360 equal parts called degrees, and each degree into...minutes, and each minute into 60 equal parts called** seconds, &c. A degree is marked thus, ° ; a minute thus, ' ; a second thus,"; and so on: for example,... | |
| Mary Somerville - Astronomy - 1835 - 532 pages
...the ellipse. NOTE 49. p. 12. Ninety degrees. A circle is divided into 3fiO equal parts, or degrees; **each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called** seconds. It is usual to write these quantities thus, 15° 16' 10'', which means fifteen degrees, sixteen... | |
| Abel Flint - Geometry - 1835 - 370 pages
....emicircles ; as AB or DE. Fig. 5. 14. The , jmference of every circle is supposed to be divided into **360 equal parts, called degrees ; and each degree into 60 equal parts, called** minute*; and each minute into 60 equal parts, called seconds; and these into thirds, &c. NOTE. Since... | |
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