jessiesec
Find the circumference and the area of a circle with a radius of 11.2 cm. Round to the nearest tenth.



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Mimi_x3
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well do you know the formula for the circumference of a circle

jessiesec
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not really. I've never really been good at this.

Mimi_x3
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okay so a circum of a circle is \(C = 2\pi r\)

jessiesec
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ok

Mimi_x3
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\(r\) is given so you sub it into the formula; and calculate

jessiesec
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OK.

Mimi_x3
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nb: area of a cirlce is \(A = \pi r^2\)

jessiesec
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Ok. I think I got it now. Thank you!