Explicație pas cu pas:
[tex] \bf L = 2\pi r[/tex]
[tex]r = 2 \implies L = 2\pi \cdot 2 = 4\pi[/tex]
[tex]r = 4 \implies L = 2\pi \cdot 4 = 8\pi[/tex]
[tex]r = 5.5 \implies L = 2\pi \cdot 5.5 = 11\pi[/tex]
[tex]r = 6.25 \implies L = 2\pi \cdot 6.25 = 12.5\pi \\ [/tex]
[tex]r = \frac{7}{2} \implies L = 2\pi \cdot \frac{7}{2} = 7\pi \\ [/tex]
[tex]r = 4 \sqrt{3} \implies L = 2\pi \cdot 4 \sqrt{3} = 8 \sqrt{3} \pi \\ [/tex]
