L = 2[tex]\pi[/tex]r <=> r = [tex]\frac{L}{2\pi }[/tex] = [tex]\frac{120}{2\pi }[/tex] = [tex]\frac{60}{\pi}[/tex]
A = [tex]\pi r^{2}[/tex] <=> [tex]\pi[/tex] x [tex]\frac{60^{2} }{\pi^{2} }[/tex] = [tex]\frac{3600}{\pi}[/tex] [tex]cm^{2}[/tex]
