Question: If two lines are parallel and a transversal intersects them, which of the following statements is true about the same-side interior angles?

Options:

1. They are equal.
2. They are complementary.
3. They are supplementary.
4. They are not related.

Correct Answer: They are supplementary.

Solution:

According to the Same-Side Interior Angles Theorem, if two parallel lines are cut by a transversal, the same-side interior angles are supplementary.