Sum of interior angles of pentagon=540
[tex]\\ \sf\dashrightarrow x+x+x+x+x+10=540[/tex]
[tex]\\ \sf\dashrightarrow 5x+10=540[/tex]
[tex]\\ \sf\dashrightarrow 5x=540-10[/tex]
[tex]\\ \sf\dashrightarrow 5x=530[/tex]
[tex]\\ \sf\dashrightarrow x=106[/tex]
Largest angle=x+10=106+10=116°
