A line is perpendicular to a circle if it intersects the circle at only one point, creating a right angle with the radius at that point. The point of intersection is called the “perpendicular foot.” Tangents are lines that are perpendicular to the circle’s circumference and are essential for analyzing angles formed within and around circles. Perpendicular lines play a crucial role in circle geometry, as they establish relationships between points, lines, and angles within the circle.
