Răspuns :
[tex]\text{Inaltimea unui triunghi echilateral are formula:}\\
\boxed{h=\dfrac{l\sqrt3}{2}},\text{unde l este latura triunghiului}\\
\dfrac{l\sqrt3}{2}}=2\sqrt{3}\Rightarrow l=4\ cm\\
\text{Aria este:}\\
A=\dfrac{l\cdot h}{2}\\
A=\dfrac{4\cdot 2\sqrt{3}}{2}=4\sqrt3\ cm^2[/tex]
Aria triunghi echilateral = ?
h - inaltimea
h = l√3/2=2√3 deci l = 4 cm
Aria = l*h/2 = 4*2√3/2 = 4√3 cm
h - inaltimea
h = l√3/2=2√3 deci l = 4 cm
Aria = l*h/2 = 4*2√3/2 = 4√3 cm
