Resposta :
[tex]\large\boxed{\begin{array}{l} \rm{C = \pi \cdot{d}} \\ \rm{C = 3,14 \cdot10} \\ \huge \boxed{ \boxed{ \boxed{ \boxed{ \rm{C =31 ,4 \: cm}}}}}\end{array}}[/tex]
[tex]\large\boxed{\begin{array}{l} \rm{C = \pi \cdot{d}} \\ \rm{C = 3,14 \cdot10} \\ \huge \boxed{ \boxed{ \boxed{ \boxed{ \rm{C =31 ,4 \: cm}}}}}\end{array}}[/tex]