Find the radius $ r $ of a circle if area $A = \frac{ 5 }{ 4 }\pi$.
Answer
$r = \frac{\sqrt{ 5 }}{ 2 }$
Explanation
To find radius $ r $ use formula:
After substituting $ A = \frac{ 5 }{ 4 }\pi $ we have:
$$ A = r^2 \cdot \pi $$ $$ r^2 \cdot \pi = \frac{ 5 }{ 4 }\pi $$ $$ r^2 = \frac{ 5 }{ 4 } $$ $$ r = \sqrt{ \frac{ 5 }{ 4 } } $$ $$ r = \frac{\sqrt{ 5 }}{ 2 } $$This page was created using
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