 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.  An Elementary Geometry and Trigonometry - Page 11by William Frothingham Bradbury - 1873 - 238 pagesFull view - About this book
 | Adrien Marie Legendre - Geometry - 1836 - 359 pages
...OF THE CIRCUMFERENCE. I. For the purposes of trigonometrical calculation, the cir cumference of the circle is divided into 360 equal parts, called degrees...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... | |
 | John Playfair - Geometry - 1836 - 114 pages
...The 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,... | |
 | John Lee Comstock - Physics - 1836 - 310 pages
...already seen, the sun appears to move Each of the 12 signs of the zodiac is divided (nto 30 smaller parts, called degrees; each degree into 60 equal parts, called minutes, and each minute into BO parts, called seconds.) The division of the zodiac into signs, is of very ancient date, each sign... | |
 | B[enjamin] Franklin Callender - Measurement - 1836 - 226 pages
...GEOMETRY. FART FIFTH. CHAPTER I. MENSURATION OF ANGLES AND TRIANGLES. SECTION I. Definitions and ProblemS. Every circle is divided into 360 equal parts, called degrees ; each degree is divided into 60 equal parts, called minutes ; each minute is divided into 60 equal parts, called... | |
 | Charles Davies - Navigation - 1837 - 336 pages
...the utmost accuracy. 41. For the purposes of trigonometrical calculations, the circumference of the circle is divided into 360 equal parts, called degrees...and each minute into 60 equal parts, called seconds. As the circumference of a circle may be regarded as a proper measure of angles, having their vertices... | |
 | Mrs. L. H. Tyler - Astronomy - 1837 - 302 pages
...plane of a circle. (21.) DBF. 4. Every circle, from the smallest to the largest, is conceived to be divided into 360 equal parts, called degrees ; each...and each minute into 60 equal parts, called seconds. These divisions are usually expressed by signs : thus, 15° 10' 15" signifies five degrees, ten minutes,... | |
 | Edward Brooks - Arithmetic - 1877 - 438 pages
...the circumference is called a quadrant. * 290. For the purpose of measuring angles, the circumference is divided into 360 equal parts, called degrees; each degree into 60 equal parts, called minutes; each minute into 60 equal parts, called seconds. 2O1. Any angle having its vertex at the centre, is... | |
 | Edward Brooks - Arithmetic - 1877 - 560 pages
...the circumference is called a quadrant. 399. For the purpose of measuring angles, the circumference is divided into 360 equal parts, called degrees; each degree into 60 equal parts, called minutes; each minute into <50 equal parts called seconds. 400. Any angle having its vertex at the centre, is... | |
 | George Augustus Walton, Electa Nobles Lincoln Walton - Arithmetic - 1877 - 348 pages
...Define plane surface ; circle ; circumference ; arc ; radius ; diameter. 330. The circumference of a circle is divided into 360 equal parts called degrees, each degree into 60 minutes, and each minute into 60 seconds. These are the units of CIRCULAR MEASURE. • TABLE. 60 seconds... | |
 | William Henry Rosser - 1877 - 158 pages
...hour. 89 = -65 42 = -7 45 = -75 ' 48 = -8 51 = -85 54 = -9 RELATION .OF CIRCULAR MEASURE. TO TIME. The circumference of every circle is divided into 360 equal parts, called degrees ; now the earth, whose circumference as a sphere is 360°, turns on its axis in the direction of this... | |
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