| Robert Simson - Trigonometry - 1827 - 546 pages
...circumference of a 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,** &c. And as many degrees, minutes, seconds, &c. as are contained in any arch, of so many degrees, minutes,... | |
| James Thomson - 1827 - 1012 pages
...circle be divided into 360 equal parts, each of them is called a degree. Each degree is subdivided **into 60 equal parts, called minutes; and each minute into 60 equal parts, called** * Geography is a description of the earth ; and is distinguished by different names, according to tha... | |
| Montgomery Robert Bartlett - Education - 1828 - 426 pages
...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;** and these into thirds, &c. Now, as all circles are not of the same magnitude, and as they are all divided... | |
| Adrien Marie Legendre - Geometry - 1828 - 346 pages
...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
...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... | |
| 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
...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. NOTE. Since all circles are divided into the same number of degrees, a... | |
| Euclid - 1835 - 540 pages
...circumference of a 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,** &c. A degree is marked thus, ° ; a minute thus, ' ; a second thus,"; and so on: for example, 57°... | |
| Mary Somerville - Astronomy - 1835 - 532 pages
...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,... | |
| John Playfair - Geometry - 1836 - 148 pages
...circumference of a circle may be 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,** &c. And as many degrees, minutes, seconds, &c. as are contained in any arc, of so many degrees, minutes,... | |
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