Đáp án:
$\widehat{xOt}=50^{\circ}\\
\widehat{yOz}=50^{\circ}\\
\widehat{zOt}=80^{\circ}$
Giải thích các bước giải:
$\widehat{xOt}=\widehat{xOy}-\widehat{yOt}=180^{\circ}-130^{\circ}=50^{\circ}\\
\widehat{yOz}=\widehat{xOy}-\widehat{xOz}=180^{\circ}-130^{\circ}=50^{\circ}\\
\widehat{zOt}=\widehat{xOy}-\widehat{xOt}-\widehat{yOz}\\
=180^{\circ}-50^{\circ}-50^{\circ}=80^{\circ}$