Find the diameter $ d $ of a circle if area $A = 45$.
Answer
$d = 7.5694$
Explanation
STEP 1: find radius $ r $
To find radius $ r $ use formula:
After substituting $ A = 45 $ we have:
$$ A = r^2 \cdot \pi $$ $$ r^2 \cdot \pi = 45 $$ $$ r = \sqrt{ \frac{ 45 }{\pi} } $$ $$ r \approx 3.7847 $$STEP 2: find diameter $ d $
To find diameter $ d $ use formula:
$$ d = 2 \cdot r $$After substituting $ r = 3.7847 $ we have:
$$ d = 2 \cdot 3.7847 $$ $$ d \approx 7.5694 $$This page was created using
Circle Calculator