Question

Aria unui triunghi echilateral este de 9√3cm².Latura triunghiului echilateral are lungimea de ...cm

Answer 1

$\frac{ l^{2} \sqrt{3} }{4}= 9\sqrt{3}<=> \frac{ l^{2} }{4}=9 => l^{2}=4*9=36=>l=6(cm).$

Answer 2

AΔ=$\frac{ l^{2 \sqrt{3} } }{4}$=>
$l^{2} \sqrt{3} = 9 \sqrt{3}*4=36 \sqrt{3}|: \sqrt{3}$=>
$L^{2}=36=>l= \sqrt{36}=6$
coroana? =3