Question

calculati aria unui triunghi echilateral de 3cm​

Answer 1

Răspuns:

$a = \frac{ {l}^{2} \sqrt{ 3} }{4 \ \\ }$

$= \frac{ {3}^{2} \sqrt{3} }{4}$

$= \frac{9 \sqrt{3} }{4}$

=