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2015-05-21T23:24:10+08:00

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Formula for the area of circle:
a.13 cm
A=πr²
A=π(13 cm)²
A=169π cm² or 530.66 cm²

b.28 m
A=πr²
A=π(28 m)²
A=784π m² or 2,461.76 m²

c.1.375 dm
A=πr²
A=π(1.375 dm)²
A=1.89π dm² or 5.93 dm²

Hope this helps =)
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