What is a line in the plane of a circle that intersects a circle at only one point the point of tangent?

A line in the plane of a circle that intersects the circle at only one point is called a tangent line. This point of intersection is known as the point of tangency. At this point, the tangent line is perpendicular to the radius drawn to the point of tangency, indicating that the line just "touches" the circle without crossing it. Tangents play a significant role in various geometric concepts and applications.