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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