Question

what is the area of equilateral triangle whose side is a unit?​

Answer 1

unit = 1 cm

$area = \frac{ \sqrt{3} }{4} {a}^{2} \\ \\ area = \frac{ \sqrt{3} }{4} {(1)}^{2} \\ \\ area = \frac{ \sqrt{3} }{4} \: {cm}^{2}$