Find the radius of a circle if an arc of arc of angle 40° has length of 4π cm
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since,we all know s=r*theta
40° in radians is 40π\180=2π\9
there fore,
radius=s/theta
r=4π\(2π/9)
r=18
yatinarora2003:
The formula by which you solved the given question is not taught in tenth grade
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