Câu hỏi 26

\(\eqalign{  & \left\{ \matrix{  {Q_{\left( {O;{{60}^0}} \right)}}\left( A \right) = F \hfill \cr  {Q_{\left( {O;{{60}^0}} \right)}}\left( B \right) = A \hfill \cr  {Q_{\left( {O;{{60}^0}} \right)}}\left( O \right) = O \hfill \cr}  \right. \Rightarrow {Q_{\left( {O;{{60}^0}} \right)}}\left( {ABO} \right) = FAO  \cr  & \left\{ \matrix{  {T_{\overrightarrow {OC} }}\left( F \right) = O \hfill \cr  {T_{\overrightarrow {OC} }}\left( A \right) = B \hfill \cr  {T_{\overrightarrow {OC} }}\left( O \right) = C \hfill \cr}  \right. \Rightarrow {T_{\overrightarrow {OC} }}\left( {FAO} \right) = OBC  \cr  &  \Rightarrow \Delta AOB\,\,\buildrel {{Q_{\left( {O;{{60}^0}} \right)}}} \over \longrightarrow \,\,\Delta FAO\,\,\buildrel {{T_{\overrightarrow {OC} }}} \over \longrightarrow \,\,\Delta OBC \cr} \)

Chọn A.