Find the area $ A $ of a circle if radius $r = 1$.
Answer
$A = \pi$
Explanation
To find area $ A $ use formula:
$$ A = r^2 \cdot \pi $$After substituting $ r = 1 $ we have:
$$ A = 1^2 \cdot \pi $$ $$ A = 1 \cdot \pi $$This page was created using
Circle Calculator