Question

Un triunghi echilateral cu latura de 2 cm are aria egala cu ... cm

Answer 1

A = l^2 √3 / 4 = 4√3 /4 = √3 cm^2

Answer 2

$A= \frac{ \sqrt{3}}{4} l^{2} \\ A= \frac{ \sqrt{3}}{4} (2cm)^{2} \Leftrightarrow~A=\frac{ \sqrt{3}}{4}\cdot 4~ cm^{2}\Rightarrow~A= \sqrt{3} ~cm^{2} .$