Find the diameter $ d $ of a circle if circumference $C = 18$.
Answer
$d = 5.7296$
Explanation
STEP 1: find radius $ r $
To find radius $ r $ use formula:
$$ C = 2 \cdot r \cdot \pi $$After substituting $ C = 18 $ we have:
$$ 18 = 2 \cdot r \cdot \pi $$ $$ r = \dfrac{ 18 }{ 2 \pi } $$ $$ r \approx 2.8648 $$STEP 2: find diameter $ d $
To find diameter $ d $ use formula:
$$ d = 2 \cdot r $$After substituting $ r = 2.8648 $ we have:
$$ d = 2 \cdot 2.8648 $$ $$ d \approx 5.7296 $$This page was created using
Circle Calculator