Question

aflati aria unui triungi echilateral cu latura de 6cm

Answer 1

A = l²√3/4 = 36√3/4 = 9√3 cm²

Answer 2

$A_{\triangle}=l^{2}\dfrac{\sqrt{3}}{4}=6^{2}\dfrac{\sqrt{3}}{4}=36\dfrac{\sqrt{3}}{4}=9\sqrt{3}$
$A_{\triangle}=9\sqrt{3}$