Q. 115.0( 1 Vote )

Find the length o

Answer :


Let AB be a side of the regular polygon with 12 sides in the circle of radius 6 cm.


If O is a centre of the circle, then AOB = = 30°


Draw OC perpendicular to AB.


Then AOC = = 15°


sin 15° = =


0.2588 =


AC = 0.2588 × 6 = 1.5528


Length of the side AB = 2 × AC = 2 × 1.5528 = 3.1056 cm


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