Question: Which of the following best describes the relationship between a circle and a tangent line?

Options:

1. A tangent line intersects the circle at two points.
2. A tangent line is perpendicular to the radius at the point of contact.
3. A tangent line can be drawn from any point inside the circle.
4. A tangent line passes through the center of the circle.

Correct Answer: A tangent line is perpendicular to the radius at the point of contact.

Solution:

A tangent line is defined as a line that touches the circle at exactly one point and is perpendicular to the radius at that point.