Question

The area of an equilateral triangle of side 4cm is (a) 3√3 cm2 (b) 4√3 cm2 (c) 2√3 cm2 (d) 3√2 cm2

Answer 1

$area \: \: of \: \: equalateral \: \: triangle \: = \frac{ \sqrt{3} {s}^{2} }{4 } \\ \\ = > \frac{ \sqrt{3} \times 4 \times 4 }{4} \\ \\ = > 4 \sqrt{3} \: \: \: \: \: \: \: is \: \: \: answer$