Question

Answer 1

Hình:))))

Answer 2

Xét \(\Delta ABC=\Delta DEF\\ có\widehat{A}=30^o;\widehat{E}=\widehat{F}\)

\(\Rightarrow\widehat{A}=\widehat{D}\left(=30^o\right)\)

\(\Rightarrow\widehat{D}+\widehat{E}+\widehat{F}=180^o\)

\(\Rightarrow\widehat{D}+x+x=180^o\)

\(\Rightarrow2x=150^o\)

\(\Rightarrow x=75^o\)

\(\Rightarrow\widehat{E}=75^o\)

Answer 3

\(\Delta ABC=\Delta DEF\\ \Rightarrow\widehat{A}=\widehat{D}=30^0\\ \widehat{E}+\widehat{D}+\widehat{F}=180^0\\ \Rightarrow\widehat{E}+\widehat{F}=150^0\\ \text{Mà }\widehat{E}=\widehat{F}\\ \Rightarrow2\widehat{E}=150^0\\ \Rightarrow\widehat{E}=75^0\)

Answer 4

Thanks with lots of love