the circumference of a circle is 13.2cm.find its diameter and the area
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circumference = 2πr
then r= 13.2/2π
and diameter = 2r= 13.2/π
= 13.2/3.14= 4.20 cm
then r= 13.2/2π
and diameter = 2r= 13.2/π
= 13.2/3.14= 4.20 cm
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