Using the figure, answer the following question and justify your answer.

Is $\angle 1$ adjacent to $\angle 2$ ?

Using the figure, answer the following question and justify your answer.

Is $\angle AOB$ adjacent to $\angle BOE$?

Using the figure, answer the following question and justify your answer.

Does $\angle BOC$ and $\angle BOD$ form a linear pair?

Using the figure, answer the following question and justify your answer.

Are the angles $\angle COD$ and $\angle BOD$ supplementary?

Using the figure, answer the following question and justify your answer.

Is $\angle 3$ vertically opposite to $\angle 1$?

In the figure $POQ, ROS$ and $TOU$ are straight lines. If the value of $x°=k$, then find the value of $k$.

In the figure $AB$ is parallel to $DC$. Find the value of $\angle 1$ and $\angle 2$. Justify your answer.

In the figure $AB$ is parallel to $CD$. Find $x, y$ and $z$.