Level:
Project ID:
2010012902
Source Problem:
Accepted:
0
Clonable:
1
Easy:
1
Derive the formula for calculating the area of an equilateral triangle inscribed in a circle of radius \( r \).
\(\frac{3\sqrt{3}r^2}{4} \)
\(\frac{3\sqrt{3}r}{4} \)
\(\frac{3\sqrt{3}r^2}{2} \)
\(\frac{\sqrt{3}r^2}{4} \)