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OpenStudy (anonymous):
What is the exact area of a circle whose diameter is 24 cm? A. 576 straight pi cm2 B. 144 straight pi cm2 C. 48 straight pi cm2 D. 24 straight pi cm2 @tkhunny @jackmullen55
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OpenStudy (anonymous):
i got B. im i correct
OpenStudy (hysusonic):
do you know how to get diameter?
OpenStudy (hysusonic):
area* sorry
OpenStudy (anonymous):
yes
OpenStudy (hysusonic):
okay so half the diameter is the radius so then you plug in the numbers into pi*r^2 so 24/2=12 12^2=144pi
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OpenStudy (anonymous):
pi*r^2 so 24/2=12 12^2=144pi. B. 144 straight pi cm2 A ≈ 452.39 cm²
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