Question

calculatii:aria unui triunghi echilateral avand lara de 6 cm va rog repedee

Answer 1

aria unui triunghi echilateral avand latura de 6 cm:
$a = \frac{ {l}^{2} \sqrt{3} }{4} \\ \\ a = \frac{ {6}^{2} \sqrt{3} }{4} \\ \\ a = \frac{36 \sqrt{3} }{4} \\ \\ simplificam \: 36 \: cu \: 4 \: prin \: 9 \\ \\ a = \frac{9 \sqrt{3} }{4} {cm}^{2}$