Question: What is the relationship between the exterior angle and the interior angle on the same side when two parallel lines are cut by a transversal?

Options:

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

Correct Answer: They are supplementary.

Solution:

The exterior angle and the interior angle on the same side are supplementary when two parallel lines are cut by a transversal.