Răspuns:
P = 3l = 24 cm => l=24/3 = 8cm
Inaltimea= [tex]\frac{l\sqrt{3} }{2}[/tex]=[tex]\frac{8\sqrt{3} }{2}[/tex]= 4[tex]\sqrt{3}[/tex] cm
apotema = [tex]\frac{inaltimea}{3}[/tex]=[tex]\frac{4\sqrt{3} }{3}[/tex]
Aria= [tex]\frac{l^{2} \sqrt{3} }{4}[/tex] = [tex]\frac{8^{2}\sqrt{3} }{4}[/tex]=[tex]\frac{64\sqrt{3} }{4}[/tex]=16[tex]\sqrt{3}[/tex] [tex]cm^{2}[/tex]
