Question

Lungimea laturii unui triunghi echilateral cu aria 27$\sqrt{3}$ cm patrati este.... cm.

Answer 1

$A=27\sqrt{3} \\ A=l^{2}\sqrt{3}/4 \\ l^{2}\sqrt{3}/4=27\sqrt{3} \\ l^{2} =4*27\sqrt{3}/\sqrt{3} \\ l^{2}= 4*27 \\ l^{2}=108 \\ l=\sqrt{108} \\ l=\sqrt{2*2*3*3*3} \\ l=2*3*\sqrt{3} \\ l=6*\sqrt{3} \\ l=6\sqrt{3}$