- Do Om và On là tia đối
\(\Rightarrow\widehat{mOt}+\widehat{tOz}+\widehat{zOn}=180^o\)
\(\Rightarrow65^o+\widehat{tOz}+40^o=180^o\)
\(\Rightarrow\widehat{tOz}=75^o\)
- Có : \(\widehat{mOz}=\widehat{mOt}+\widehat{tOz}\Rightarrow\widehat{mOz}=65^o+75^o=140^o\)
\(\Rightarrow\widehat{mOz}>\widehat{zOt}\left(140^o>75^o\right)\)
- Có :\(\widehat{nOt}=\widehat{zOt}+\widehat{zOn}\Rightarrow\widehat{nOz}=75^o+40^o=115^o\)
\(\Rightarrow\widehat{nOt}>\widehat{zOt}\left(115^o>75^o\right)\)
Vậy:......
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