How many angles are formed in the following figure? Name the angles.

 In the given figure, list the points which are in the interior of $\angle Y$.

 In the given figure, list the points which are in the exterior of $\angle Y$.

 In the given figure, list the points which lie on $\angle Y$.

Find the measure of $x$ in the following figure:

Find the measure of $x$ in the following figure:

Find the measure of $x$ in the following figure:

Find the measure of $x$ in the following figure:

Find the measure of $x$ in the following figure: