 | Adrien Marie Legendre - Geometry - 1852 - 436 pages
...the radius (B. v., P. 15, c). Or, 2. Compute the area of the whole circle: then say, as 360 degrees is to the degrees in the arc of the sector, so is the area of the whole circle to the area of the sector. Ex. 1. To find the area of a circular sector whose... | |
 | Charles Haynes Haswell - Engineering - 1853 - 318 pages
...Circle — -Jig. 13. RULE 1. — Multiply the length of the arc adb by half the length of the radius ao. RULE 2. — As 360 is to the degrees in the arc of the sector, so is the area of the circle to the area of the sector. NOTE. — If the diameter or radius is not given, add... | |
 | Ezra S. Winslow - Business mathematics - 1853 - 264 pages
...the length of one of the sides of the sector, -—and the product- is the area of the sector. Or, — 2. As 360 is to the degrees in the arc of the sector, so is the area of the circle to the area of the sector. EXAMPLE. — The length of the arc, CE, of the sector... | |
 | Charles Davies - Geometry - 1854 - 436 pages
...half the radius (BV, P. 15, c). Or, 2. Compute the area of the whole circle: then say, as 360 degrees is to the degrees in the arc of the sector, so is the area of tl1e whole circle to the area of tl1e sector. Ex. 1. To find the area of a circular sector... | |
 | Benjamin Greenleaf - Arithmetic - 1858 - 472 pages
...sector of a circle. Multiply the length of the arc by half the radius of the circle. Or, As 360° are to the degrees in the arc of the sector, so is the area of the circle to the area of the sector. Ex. 1 . Required the area of a sector, of which the arc... | |
 | Benjamin Greenleaf - Arithmetic - 1858 - 458 pages
...sector of a circle. Multiply the length of the arc by half the radius ofihe circle. Or, As 360° are to the degrees in the arc of the sector, so is the area of the circle to the area of the sector. Ex. 1. Required the area of a sector, of which the arc... | |
 | Alfred Newsom Niblett - 1861 - 204 pages
...circumference of the whole circle, and the remainder will be the length of the arc required. 2. As 300 is to the degrees in the arc of the sector, so is the area of the whole circle to the area of the sector. NOTE.—The area of a semicircle, a quadrant, &c.,... | |
 | Benjamin Greenleaf - Geometry - 1862 - 518 pages
...Multiply the arc of the sector by half of its radius (Prop. XV. Cor. 1, Bk. VI.) ; or, ' As 360° are to the degrees in the arc of the sector, so is the area of the circle to the area of the sector. EXAMPLES. 1. Required the area of a sector, DE, whose... | |
 | Benjamin Greenleaf - Geometry - 1862 - 532 pages
...Multiply the arc of the sector by half of its radius (Prop. XV. Cor. 1, I3k. VI.) ; or, As 360° are to the degrees in the arc of the sector, so is the area of the circle to the area of the sector. EXAMPLES. 1. Required the area of a sector, DE, whose... | |
 | Benjamin Greenleaf - Geometry - 1863 - 504 pages
...Multiply the arc of the sector by half of its radius (Prop. XV. Cor. 1, Bk. VI.) ; or, As 360° are to the degrees in the arc of the sector, so is the area of the circle to the area of the sector. EXAMPLES. 1. Required the area of a sector, DE, whose... | |
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As 360 is to the degrees in the arc of the sector, so is the area of the whole circle to the area of the sector. 
