| 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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