$\"\"$

\

The measure of $\"\"$ is $\"\"$ .

\

The skis shows $\"\"$ and $\"\"$ are vertical angles and $\"\"$ are supplementary angles.

\

Since vertical angles are congruent.

\

So, $\"\"$ . $\"\"$

\

Since $\"\"$ are supplementary angles.

\

So, $\"\"$ (Sum of the measures of supplementary angles is $\"\"$ )

\

$\"\"$ (Substitute $\"\"$ )

\

$\"\"$ (Subtract 60 from each side)

\

$\"\"$ (Subtract: $\"\"$ ) $\"\"$

\

Since $\"\"$ are vertical angles

\

So, $\"\"$ . $\"\"$

\

The measures are $\"\"$ .