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pottersheepBest ResponseYou've already chosen the best response.1
Think about it. Whats the formula for circumference?
 2 years ago

Lola9Best ResponseYou've already chosen the best response.2
\[circumference = 2 \pi r\]find r then \[area = \pi r^2\]
 2 years ago

HarkiratBest ResponseYou've already chosen the best response.1
for finding area we need value of radius .... circumference = 2πr Area = πr^2
 2 years ago

pottersheepBest ResponseYou've already chosen the best response.1
31.4CM =2πr r = 4.99
 2 years ago

pottersheepBest ResponseYou've already chosen the best response.1
Get it? Cuz 31.4CM divided by 2 divided by π gives you r
 2 years ago

pottersheepBest ResponseYou've already chosen the best response.1
Round that number to 5.
 2 years ago

pottersheepBest ResponseYou've already chosen the best response.1
Now plug the new radius into the area formula
 2 years ago

robtobeyBest ResponseYou've already chosen the best response.0
pottersheep has just established that:\[\text{area of a circle}=\frac{c^2}{4 \pi }\]
 2 years ago
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