 | James Stewart Eaton - 1857 - 376 Seiten
...sector, RULE 1. — First fnd the area of the whole circle, and then sny, as 360° 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 ; or, RULE 2. — First find the length of the arc of the sector,... | |
 | Benjamin Greenleaf - 1858 - 472 Seiten
...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 is 79 and... | |
 | Benjamin Greenleaf - 1858 - 458 Seiten
...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 is 79 and... | |
 | Alfred Newsom Niblett - 1861 - 204 Seiten
...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...area of the whole circle to the area of the sector. NOTE.—The area of a semicircle, a quadrant, &c., may be most easily found by taking one half, one... | |
 | Benjamin Greenleaf - 1862 - 532 Seiten
...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 arc is 80 feet,... | |
 | Benjamin Greenleaf - 1862 - 518 Seiten
...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 arc is 80 feet,... | |
 | Benjamin Greenleaf - 1863 - 504 Seiten
...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 arc is 80 feet,... | |
 | Sir Rowland Macdonald Stephenson - 1866 - 270 Seiten
...the arc of the sector for the area. Note. — The arc may be found by Prob. IX. RULE II. — As 360 is to the degrees in the arc of the sector, so is the whole area of the circle to the area of the sector. 1. What is the area of the sector CADB, the radius... | |
 | Benjamin Greenleaf - 1868 - 340 Seiten
...Multiply the arc of the sector by half of its radius (Pro]). 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 arc is 80 feet,... | |
 | Sir Rowland Macdonald Stephenson - 1869 - 446 Seiten
...the arc of the sector for the area. Note. — The arc may be found by Prob. IX. RULE II. — As 360 is to the degrees in the arc of the sector, so is the whole area of the circle to the area of the sector. 1. What is the area of the sector CADB, the radius... | |
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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. 
