Ta có: \(\widehat{MOP}+\widehat{NOP}=180^0\) (kề bù)
Mà: \(\widehat{MOP}=4.\widehat{NOP}\left(GT\right)\)
\(\Rightarrow4.\widehat{NOP}+\widehat{NOP}=180^0\)
\(\Rightarrow5.\widehat{NOP}=180^0\)
\(\Rightarrow\widehat{NOP}=180^0:5=36^0\)
\(\widehat{MOP}=4.\widehat{NOP}\left(GT\right)\)
\(\Rightarrow\widehat{MOP}=4.36^0=144^0\)
Có: \(\left\{{}\begin{matrix}\widehat{QOM}=\widehat{NOP}=36^0\\\widehat{NOQ}=\widehat{MOP}=144^0\end{matrix}\right.\) (đối đỉnh)