In the given figure, $OA$ and $OB$ are opposite rays. If $x=42°$, what is the value of $y?$

In the given figure, $AOB$ is a straight line.Find $x$ and also the measure of each angle.

In the given figure, $\angle POR$ and $\angle QOR$ form a linear pair. If $x:y=2:3$, find the values of $x$ and $y$.

If $x=\frac{2}{3}$ of a right angle and $y=125°$ are adjacent angles. Are their non-common arms in a straight line or not? Justify your answer.

In the given figure, $OD\perp OC.$ Find $\angle AOD+\angle COB$

In each of the given figure, $AOB$ is a straight line. Determine $x$.

In each of the given figure, $AOB$ is a straight line. Determine $x$.

In each of the given figure, $AOB$ is a straight line. Determine $x$.

In each of the given figure, $AOB$ is a straight line. Determine $x$.