Find the circumference $ C $ of a circle if area $A = 430$.
Answer
$C = 23.3985\pi$
Explanation
STEP 1: find radius $ r $
To find radius $ r $ use formula:
After substituting $ A = 430 $ we have:
$$ A = r^2 \cdot \pi $$ $$ r^2 \cdot \pi = 430 $$ $$ r = \sqrt{ \frac{ 430 }{\pi} } $$ $$ r \approx 11.6993 $$STEP 2: find circumference $ C $
To find circumference $ C $ use formula:
$$ C = 2 \cdot r \cdot \pi $$After substituting $ r = 11.6993 $ we have:
$$ C = 2 \cdot 11.6993 \cdot \pi $$ $$ C \approx 23.3985\pi $$This page was created using
Circle Calculator