 | Montgomery Robert Bartlett - 1828 - 426 halaman
...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 - 1828 - 346 halaman
...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 - 1830 - 318 halaman
...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 - 312 halaman
...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 - 1832 - 290 halaman
...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 - 1832 - 128 halaman
...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... | |
 | Euclid - 1835 - 540 halaman
...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 - 1835 - 532 halaman
...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,... | |
 | John Lee Comstock - 1835 - 308 halaman
...neai the star a. Each of the 12 signs of the zodiac is divided into 30 smaller parts, called degrees; each degree into 60 equal parts, called minutes, and each minute into (50 parts, called seconds. The division of the zodiac into signs, is of very ancient date, each sign... | |
 | John Lee Comstock - 1835 - 308 halaman
...neai the star a. Each of the 12 signs of the zodiac is divided into 30 smaller parts, called degrees; each degree into 60 equal parts, called minutes, and each minute into GO parts, called seconds. The division of the zodiac into signs, is of very ancient date, each sign... | |
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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. 
