[tex]a)~Unghiurile~evidentiate~sunt~suplementare. \\ \\ 150 \textdegree + (2x-40) \textdegree = 180 \textdegree \Leftrightarrow 110 \textdegree+2x=180 \textdegree \Rightarrow 2x= 70 \textdegree \Rightarrow x = 35 \textdegree .\\ \\ b)~Unghiurile~evidentiale~sunt~congruente~(fiind~corespondente) \\ \\ (3x-10) \textdegree =50 \textdegree \Rightarrow 3x=60 \textdegree \Rightarrow x=20 \textdegree .\\ \\ .[/tex]
