Let the side of the equilateral triangle be x cm.
As, the area of an equilateral triangle = \(\frac{\sqrt{3}}{4}\)(side)2 = \(\frac{x^2\sqrt{3}}{4}\)
Now, area of the equilateral triangle = 3x
= \(3\times 4\sqrt{3}\)
= \(12\sqrt{3}\)
= 12 x 1.73
= 20. 76 cm2