In the adjacent figure, write another name for $\angle 1, \angle 2$ and $\angle 3$.

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

 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: