What is the altitude of an equilateral triangle whose side is 6 cm?

3\(\sqrt{3}\) 4\(\sqrt{3}\) 5\(\sqrt{3}\) 2\(\sqrt{3}\)

3\(\sqrt{3}\)

(a =  side of an equilateral triangle) Altitude of an eq. triangle =  \(\frac{\sqrt{3}}{2}\) × a = \(\frac{\sqrt{3}}{2}\) × 6 = 3\(\sqrt{3}\) cm