 | Montgomery Robert Bartlett - Education - 1828 - 426 pages
...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...parts, called seconds; and these into thirds, &c. Now, as all circles are not of the same magnitude, and as they are all divided into the same number... | |
 | 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 of the... | |
 | 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 their vertices... | |
 | John Lee Comstock - Physics - 1831 - 312 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... | |
 | Robert Gibson - Surveying - 1832 - 290 pages
...circumference into two equal parts, called semicircles ; and is double the radius, as AB or DE, fig. 8. 16. The circumference of every circle is supposed to be...equal parts called seconds, and these into thirds, fourths, &c. these parts being greater or less as the radius is. 17. A chord is a right line drawn... | |
 | 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 miles... | |
 | Abel Flint - Geometry - 1835 - 368 pages
...point. Fiff. 4. Fig. 5. 10. A circle is a round figure bounded by a single line, in every part equally distant from some point, which is called the centre....quantity of any determinate length, as so many inches or feet, &c. but is always to be reckoned as being the 360th part of the circumference of any circle,... | |
 | Abel Flint - Geometry - 1835 - 366 pages
...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;...quantity of any determinate length, as so many inches or feet, &c. but is always to be reckoned as being the 360th part of the circumference of any circle,... | |
 | Euclid - 1835 - 540 pages
...and BC, in A and C ; the arch AC is called the measure of the angle ABC. II. The circumference of a circle is supposed to be divided into 360 equal parts...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, 57°... | |
 | 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 minutes,... | |
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The circumference of every circle is supposed to be 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 these into thirds, &c. 
