Resposta :
[tex]\boxed{\begin{array}{l}\sf960^\circ=2\cdot360^\circ+200^\circ\\\sf 200^\circ-180^\circ=20^\circ\\\huge\boxed{\boxed{\boxed{\boxed{\sf\maltese~alternativa~A}}}}\end{array}}[/tex]
[tex]\boxed{\begin{array}{l}\sf960^\circ=2\cdot360^\circ+200^\circ\\\sf 200^\circ-180^\circ=20^\circ\\\huge\boxed{\boxed{\boxed{\boxed{\sf\maltese~alternativa~A}}}}\end{array}}[/tex]