 | Mechanical engineering - 1900 - 428 pages
...the sector AEBC by the following rule of proportion : As 360 degrees is to the number of degrees in the sector so is the area of the circle to the area of the sector. The area of a circle 48 inches in diameter is 1,809.6 square inches; hence we have 360 : 130° 34'... | |
 | William Kent - Engineering - 1907 - 1206 pages
...Multiply the arc of the sector by half its radius. RULE 2. As 360 is to the number of degrees in the arc, so is the area of the circle to the area of the sector. RULE 3. Multiply the number of degrees in the arc by the square of the radius and by .008727. To find... | |
 | Frederick Thomas Hodgson - Architecture, Domestic - 1904 - 364 pages
...find the area of a sector of a circle. Rule. — •!. Find the length of the arc by problem vii. 2. Multiply the length of the arc thus found, by half...the area of the circle to the area of the sector. NOTE. — If the diameter of radius is not given, add the square of half the chord of the arc to the... | |
 | Joseph Gregory Horner - Engineering - 1906 - 572 pages
...of a circle and two radii. To find its area : — As 360° is to the number of degrees in the angle of the sector, so is the area of the circle to the area of the sector. Or, multiply the arc by the radius, and take half the product. The segment of a circle is the figure... | |
 | 1906 - 582 pages
...of a circle and two radii. To find its area : — As 360° is to the number of degrees in the angle of the sector, so is the area of the circle to the area of the sector. Or, multiply the arc by the radius, and take half the product. The segment of a circle is the figure... | |
 | Frederick Thomas Hodgson - 1917 - 716 pages
...To find the area of a sector of a circle. Rule. — I. Find the length of the arc by problem vii. 2. Multiply the length of the arc thus found, by half...the area of the circle to the area of the sector. NOTE. — If the diameter of radius is not given, add the square of half the chord of the arc to the... | |
 | Anthony Nesbit - Measurement - 1859 - 482 pages
...the arc 45 feet, and the radius 37 feet 6 inches? Ans. 2617ft. 10 in. 6 pa. EULE n. 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. Note 1. — The area of a semicircle, a quadrant, &c. may be... | |
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As 360 degrees is to the number of degrees in the arc of the sector, so is the area of the circle to the area of the sector. 
