Area of an equilateral triangle = âˆš3/4 S2
If S = 18, Area of triangle = âˆš3/4 * 18 * 18 = 81âˆš3 cm2;
What is the are of an equilateral triangle of side 18 cm?
Options:
* 66âˆš3 cm2
* 74âˆš3 cm2
* 81âˆš3 cm2
* 64âˆš5 cm2
* 14âˆš3 cm2