Răspuns :

Atlarsergiu18791id

[tex]a = \frac{l {}^{2} \sqrt{3} }{4} \\ a = \frac{3 {}^{2} \sqrt{3} }{4} \\ a = \frac{9 \sqrt{3} }{4} [/tex]

Dianageorgiana794id

Răspuns:

Atr.= L²·√3/4

h= L·√3/2

h= 3cm

3=L·√3/2=> L= (3·2)/√3=>L= 6/√3=>L= 2√3cm → latura triunghiului

A= L²·√3/4= (2√3)²·√3/4= 12·√3/4=> A= 3√3cm² → aria

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