Question
Find the side $ a $ of an equilateral triangle if circumcircle radius $R = 3.5\, \text{cm}$.
Answer
$6.0622\, \text{cm}$
Explanation
To find side $ a $ use formula:
$$ R = \dfrac{ \sqrt{ 3 } \cdot a }{ 3 } $$After substituting $R = 3.5\, \text{cm}$ we have:
$$ 3.5\, \text{cm} = \dfrac{ \sqrt{ 3 } \cdot a }{ 3 } $$ $$ \sqrt{ 3 } \cdot a = 3.5\, \text{cm} \cdot 3 $$ $$ \sqrt{ 3 } \cdot a = 10.5\, \text{cm} $$ $$ a = \dfrac{ 10.5\, \text{cm} }{ \sqrt{ 3 } } $$ $$ a \approx 6.0622\, \text{cm} $$This page was created using
Equilateral Triangle Calculator