\(\widehat{DFG}=26^0+34^0=60^0\)
\(\text{Xét }\Delta DFE\text{ có:}\)
\(\widehat{DEF}+\widehat{EDF}+\widehat{DFE}=180^0\text{(tính chất tổng 3 góc 1 tam giác)}\)
\(34^0+26^0+\widehat{DFE}=180^0\)
\(\Rightarrow\widehat{DFE}=180^0-\left(34^0+26^0\right)=120\)
\(\text{Vì }\widehat{DFE}\text{ và }\widehat{DFG}\text{ là 2 góc kề bù}\)
\(\Rightarrow\widehat{DFE}+\widehat{DFG}=180^0\)
\(\Rightarrow\widehat{DFG}=180^0-\widehat{DFE}\)
\(\Rightarrow\widehat{DFG}=180^0-120^0=60^0\)