| Thomas Keith - Navigation - 1810 - 478 pages
...from one extremity of the arc to the other. Thus bn is the chord of the arc bu, or of the arc HAFBni. The chord of an arc of 60° is equal to the radius of the circle.* (H) The complement of any arc is the difference between that arc and a quadrant. Or... | |
| Institution of Civil Engineers (Great Britain) - Civil engineering - 1887 - 642 pages
...accurately can the angles be plotted if a greater multiple of 57 • 3 millimetres bo used as radius. As the chord of an arc of 60° is equal to the radius, that angle can be readily plotted, and angles greater or less can be arranged thus, and easily measured... | |
| Thomas Keith - 1839 - 498 pages
...from one extremity of the arc to the other. Thus bn is the chord of the arc In, or of the arc HAFBD&. The chord of an arc of 60° is equal to the radius of the circle.* (96) The complement of any arc is the difference between that arc and a quadrant. Or... | |
| Janet Taylor - Nautical astronomy - 1851 - 674 pages
...one extremity of the arc to the other. Thus, NO is the chord of the arc NBO, or of the arc NWMPBO. The chord of an arc of 60°, is equal to the radius of the circle. From these definitions, it is obvious that every degree in the quadrantal arc EM (with... | |
| Popular educator - 1852 - 1272 pages
...arc A M. The •/...'' of a tirth part of the circle is equal to the radius of the circle, that is, the chord of an arc of 60° is equal to the radius. In the construction of the Trigonometrical Lines on the Plane Sea!e, fig. 2, p. 13, vol. iv., the Line... | |
| Encyclopedias and dictionaries - 1868 - 872 pages
...divided into a thousand parts, and each division were ю'ол^Ь too long or too short, the error woidd amount to a whole division at the end of a thousand...accurate, and has been adopted by Graham, Bird, Ramsden, Tvoughton, and other eminent nrtists in original graduation. Curved lines are divided on this principle.... | |
| Richard Wormell - Geometry, Modern - 1868 - 286 pages
...chords which form the sides of the regular polygons mentioned above, taking the radius as the unit. The chord of an arc of 60° is equal to the radius. 297. The chord in this case is the sidg of the inscribed hexagon. Join the extremities of the arc to... | |
| Ephraim Chambers - Encyclopedias and dictionaries - 1870 - 852 pages
...accuracy is obtained. Thus, if a line were divided into a thousand parts, and each division were m'ooth too long or too short, the error would amount to a...most accurate, and has been adopted by Graham, Bird, Kamsden, Troughton. and other eminent artists in original graduation. Curved lines are divided on this... | |
| Richard Wormell - Geometry, Plane - 1870 - 304 pages
...chords which form the sides of the regular polygons mentioned above, taking the radius as the unit. The chord of an arc of 60° is equal to the radius. 297. The chord in this case is the side of the inscribed hexagon. Join the extremities of the arc to... | |
| André Darré - 1872 - 226 pages
...Because every one of the three angles may be taken for the vertex of an isosceles triangle. THEOREM. 52. The chord of an arc of 60° is equal to the radius of the circle. Let BE (Fig. 49) be the chord of an arc of 60°. Draw the radii CB and CE. Then CBE... | |
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