Vì \(On\in\widehat{xOy}\)
\(\Leftrightarrow\widehat{xOn}+\widehat{nOy}=\widehat{xOy}\)
\(\Leftrightarrow\widehat{xOn}=\widehat{xOy}-\widehat{nOy}\)
\(=150-110\)
\(=40^o\)
Vì \(\widehat{xOn}< \widehat{xOm}\)
\(\Leftrightarrow\widehat{xOn}+\widehat{nOm}=\widehat{xOm}\)
\(\Leftrightarrow\widehat{nOm}=\widehat{xOm}-\widehat{xOn}\)
\(=90-40\)
\(=50^o\)