Question

Cho hai góc kề bù và Biết
Khi đó

Answer 1

Ta có \(\widehat{AOB}+\widehat{BOC}=180^0\)(kề bù )

\(\Rightarrow2\widehat{BOC}+\widehat{BOC}=180^0\)

\(\Rightarrow3\widehat{BOC}=180^0\)

\(\Rightarrow\widehat{BOC}=60^0\)

Answer 2

\(\widehat{AOB} + \widehat{BOC} = 180^0\)

\(\widehat{AOB} = 2\widehat{BOC}\) (gt)

\(\Rightarrow\)\(\widehat{BOC} = 60^0\)

\(\widehat{AOB} = 120^0\)