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OpenStudy (anonymous):
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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OpenStudy (mimi_x3):
well do you know the formula for the circumference of a circle
OpenStudy (anonymous):
not really. I've never really been good at this.
OpenStudy (mimi_x3):
okay so a circum of a circle is \(C = 2\pi r\)
OpenStudy (anonymous):
ok
OpenStudy (mimi_x3):
\(r\) is given so you sub it into the formula; and calculate
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OpenStudy (anonymous):
OK.
OpenStudy (mimi_x3):
nb: area of a cirlce is \(A = \pi r^2\)
OpenStudy (anonymous):
Ok. I think I got it now. Thank you!
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