In circle radius 21cm area?circumderence? solution
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radius =21cm
Circumference of circle=2pi.r (pi=22/7)
So;circumference=2*22/7*21=132cm
Area of circle=pi*radiud square=22/7*21*21=1386cmsq.
Circumference of circle=2pi.r (pi=22/7)
So;circumference=2*22/7*21=132cm
Area of circle=pi*radiud square=22/7*21*21=1386cmsq.
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