Câu hỏi của Nguyen Minh Ha

\(\widehat{mOy}+\widehat{xOn}=70^o\)mà \(\widehat{mOy}=\widehat{xOn}\left(đối.đỉnh\right)\)\(\Rightarrow\widehat{mOy}=70^o:2=35^o\)mà \(\widehat{mOy}+\widehat{mOx}=180^o\left(kề.bù\right)\)\(\Rightarrow\widehat{mOx}=180^o-35^o=145^o\)Câu trả lời: \(\widehat{mOy}+\widehat{xOn}=70^o\)mà \(\widehat{mOy}=\widehat{xOn}\left(đối.đỉnh\right)\)\(\Rightarrow\widehat{mOy}=70^o:2=35^o\)mà \(\widehat{mOy}+\widehat{mOx}=180^o\left(kề.bù\right)\)\(\Rightarrow\widehat{mOx}=180^o-35^o=145^o\)