Final answer:
When two parallel lines are cut by a transversal, the measure of the other interior angle on the same side of the transversal is x degrees.
Step-by-step explanation:
When two parallel lines are cut by a transversal, the interior angles on the same side of the transversal are called corresponding angles. Corresponding angles are congruent, which means they have the same measure. So, if one interior angle measures x degrees, the measure of the other interior angle on the same side of the transversal is also x degrees. Therefore, the correct answer is (a) x degrees.
Learn more about Parallel Lines and Transversals