find the radius and the circumference of a circle whose area is 144 Pi CM square
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Given that,
Area of a circle = 144 π
Area of a circle formula = πr^2 ( radius )
Equate the area of circle with the formula,
πr^2 = 144π
π gets cancelled ,
R^2 = 144
That is , ( radius )^2 = 144
Radius = √144 = √ 12 x 12
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♦ Radius = 12 ♦
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Circumference of circle = 2πr
= 2 x 22/7 x 12
= 44/7 x 12
= 528/7
= 75.42 cm^2 .
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♦ Circumference = 75.42 cm^2 ♦
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