Kẻ OE//NM//PQ
\(\Rightarrow\left\{{}\begin{matrix}\widehat{MOE}=\widehat{M_1}=40^0\left(so.le.trong\right)\\\widehat{POE}=180^0-\widehat{P_1}=180^0-130^0=50^0\left(trong.cùng.phía\right)\end{matrix}\right.\)
\(\Rightarrow\widehat{MOP}=\widehat{MOE}+\widehat{POE}=40^0+50^0=90^0\)