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Mathematics

OpenStudy (waheguru):

what do we get if we divide a circles area by its circumfrence

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OpenStudy (waheguru):

cuz i dont understand this question |dw:1314318723421:dw|

OpenStudy (anonymous):

\[area=\pi r^2\] \[circumference=2 \pi r\] \[\frac{area}{circumference}=\frac{\pi*r*r}{2*\pi*r}\] \[=r/2\]

OpenStudy (anonymous):

Here's the formula for area: \[A=\pi r^2\] Here's the formula for the circumference: \[C=2\pi r\] Now just divide them: \[(\pi r^2)/(2\pi r) = (r^2)/(2r) = r/2\]

OpenStudy (waheguru):

so i divide 20 by ?

OpenStudy (anonymous):

nope r/2=area/circumference r/2=20 r=2*20 r=40

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OpenStudy (waheguru):

thx bro i got it yea

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