(i) Given, \(l || m\) and \(t\) is transversal line.
∴ Interior vertically opposite angle between lines \(l\) and \(t\) = \(110\degree\)
∴ \(110\degree + x = 180\degree\) [Supplementary angles]
(ii) Given, \(l || m\) and \(t\) is transversal line.
\(x+2x = 180\) [Interior opposite angles]
\(\Rightarrow 3x = 180\degree \Rightarrow x = \frac{180\degree}{3}=60\degree\)
Read more: Pairs of Angles