kimtaehyungg kimtaehyungg

20-02-2017
Mathematics

Answered

the length of an arc of a circle is 12cm. the corresponding sector area is 108 cm^2 find the radius of the circle ...Someone, please help

Verified Answer :

reinkyl000 reinkyl000

20-02-2017

s = (angle/360)2pir

s = (t/360)2pir

s = (2t/360)pir

s = (t/180)pir

now plug in s = 12 to get

12 = (t/180)pir

now solve for the angle t to get

t = 18012/(pir)

t = 2160/(pi*r)

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