| John Ainslie - Surveying - 1812 - 358 pages
...circle is used to measure the rate of divergence of the two lines forming an angle : for this purpose the circumference of the circle is conceived to be divided into 360 equal parts, called degrees; the semicircle contains 180 of these degrees ; the quadrant ACD, (Fig. 22. Plate I.), contains 90 degrees... | |
| Adrien Marie Legendre - Geometry - 1828 - 346 pages
...spherical triangles. DIVISION OF THE CIRCUMFERENCE. I. For the purposes of trigonometrical 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.... | |
| John Ainslie - 1849 - 586 pages
...computed. The circle is used to measure the divergence of the two lines forming an angle : for this purpose the circumference of the circle is conceived to be...into 360 equal parts, called degrees ; the degree is divided into 60 parts called minutes, and the minute into 60 parts called seconds ; the semicircle... | |
| James B. Dodd - Arithmetic - 1852 - 410 pages
...axis. Division of the Circumference, and the Measure of Angles. § 304. The Circumference of every 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.... | |
| James B. Dodd - 1853 - 398 pages
...axis. Division of the Circumference, and the Measure of Angles. § 393. The Circumference of every 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.... | |
| James Edward Oliver - Trigonometry - 1881 - 120 pages
...revolution ; such returns are periodic. § 2. ANGULAR NOTATION. The right angle is divided into 90 equal parts called degrees, the degree, into 60 equal parts called minutes; the minute, into 60 equal parts called seconds. Degrees, minutes and seconds are marked °, ', ", respectively,... | |
| Cornell University. Department of Mathematics - 1881 - 120 pages
...revolution ; such returns are periodic. § 2. ANGULAR NOTATION. The right angle is divided into 90 equal parts called degrees, the degree, into 60 equal parts called minutes; the minute, into 60 equal parts called seconds. Degrees, minutes and seconds are marked °, ', ", respectively,... | |
| Andrew Jackson Rickoff - Arithmetic - 1886 - 688 pages
...the fixed point within is the center of the circle. 227. For the measurement of angles (see Art. 56), the circumference of the circle is conceived to be divided into 360 equal parts, called degrees. The angle in this figure is an angle of 90 degrees — one fourth of the 360 equal parts into which the... | |
| Andrew Jackson Rickoff - 1888 - 464 pages
...the fixed point within is the center of the circle. 227. For the measurement of angles (see Art. 56), the circumference of the circle is conceived to be divided into 360 equal parts, called degrees. The angle in this figure is an angle of 90 degrees—one fourth of the 360 equal parts into which the circumference... | |
| George Anthony Hill - Geometry - 1888 - 200 pages
...-B = $AOD, etc. 3. Describe the units used for measuring angles. The right angle is divided into 90 equal parts called degrees, the degree into 60 equal parts called minutes, the minute into 60 equal parts called seconds. Abbreviations : the sign ° stands for "degree," ' for... | |
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