$\widehat{AOD}=180^{\circ}-147^{\circ}=33^{\circ}$
$\widehat{COD}=\widehat{AOB}=147^{\circ}$
$\widehat{COB}=\widehat{AOD}=33^{\circ}$
$\widehat{AOD}=180^{\circ}-147^{\circ}=33^{\circ}$
$\widehat{COD}=\widehat{AOB}=147^{\circ}$
$\widehat{COB}=\widehat{AOD}=33^{\circ}$