Question

Find the area of an equilateral triangle with side 4√5 cm

Answer 1

Step-by-step explanation:

$Area \: of \: equilateral \: triangle = \frac{ \sqrt{3} }{4} \times {(side)}^{2} \\ = \frac{ \sqrt{3} }{4} \times {(4 \sqrt{5}) }^{2} \\ = \frac{ \sqrt{3} }{4} \times 16 \times 5 \\ = 20 \sqrt{3} \: sq \: cm$

Mark it as brainliest.