Find the circumference $ C $ of a circle if diameter $d = 8$.
Answer
$C = 8\pi$
Explanation
STEP 1: find radius $ r $
To find radius $ r $ use formula:
$$ d = 2 \cdot r $$After substituting $ d = 8 $ we have:
$$ 8 = 2 \cdot r $$ $$ r = \dfrac{ 8 }{ 2 } $$ $$ r = 4 $$STEP 2: find circumference $ C $
To find circumference $ C $ use formula:
$$ C = 2 \cdot r \cdot \pi $$After substituting $ r = 4 $ we have:
$$ C = 2 \cdot 4 \cdot \pi $$ $$ C = 8\pi $$This page was created using
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