A = l² => l² = 72 = l = √72 = 6√2 cm P = 4*l = 4*6√2 = 24√2 cm => B) 24√2 cm ______________ Pt. exercitiul din comentariu: Aplicam teorema lui Pitagora pt. a afla ipotenuza. => ip² = cateta1 ² + cateta2 ² ip² = 12²+16² ip² = 144+256 ip² = 400 ip = √400 ip = 20 cm P = 20 + 12 + 16 = 48 cm => C) 48 cm