If the number of sides of a polygon is $12$, then find the number of diagonals in the polygon.

Find the value of $x$.

The measure of an unknown angle is $x°$ in the given figure. Find the value of $x$.

The measure of unknown angle $x$ in the given figure is $K°$. Find the value of $K.$

Find the measure of unknown angle $x$ (in degrees) in the given figure.

Find the value of $x+y+z$  in the given figure.

The value of $x+y+z=p°$, find the value of $p$.

The value of $x-y+z-w=k°$ in the given figure, then find the value of $k$.

If the value of the unknown angle $x$ in the given figure is $k°$, then find the value of $k.$