| Nathaniel Bowditch - 1826 - 617 páginas
...small, are supposed to have th cumference divided into 360 equal parts, called degrees, and each deçr **60 equal parts, called minutes ; and each minute into 60 equal parts.** seconds, and so on into thirds, fourths,* be. and an arch is said to bi many degrees as it contains... | |
| Robert Simson - 1827 - 513 páginas
...meeting BA, BC, in A, 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...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
...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... | |
| John Gummere - 1828 - 216 páginas
...determined. 2. The periphery of every circle is supposed to be divided into 360 equal parts, called degrees ; **each degree into 60 equal parts, called minutes ;...minute into 60 equal parts, called seconds, &c. 3.** The measure of an angle is the arc of a circle, contained between the two lines that form the angle,... | |
| Adrien Marie Legendre - 1828 - 316 páginas
...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... | |
| Montgomery Robert Bartlett - 1828
...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;** and these into thirds, &c. Now, as all circles are not of the same magnitude, and as they are all divided... | |
| John Playfair - 1829 - 186 páginas
...will be the proper measure of the angle BGC. Mathematicians suppose the circumference of every circle **to be divided into 360 equal parts, called degrees,...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 - 1830 - 284 páginas
...divides the circle into two equal parts, called semicircles ; as AB or DE. Fig. 5. 14. The circumference **of every circle is supposed to be divided into 360...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 - 1830 - 300 páginas
...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 - 1831 - 295 páginas
...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... | |
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