Question

Find the area of an equilateral triangle with side 2√3cm .

Answer 1

(a) Given, side of an equilateral triangle is 2√3 cm.
Area of an equilateral triangle = √3/4 (Side)2
= √3/4 (2√3)2 
= (√3/4) x 4 x 3
= 3√3
= 3 x 1.732
= 5.196 cm2
Hence, the area of an equilateral triangle is 5.196 cm2.