Definitions+for+section+9.2


 * Secant:** A line that intersects a circle at two points.
 * Tangent:** A line that intersects a circle at one point.
 * Point of Tangency:** A line in a plane of the circle that intersects the circle at exactly one point is known as point of tangency.
 * __Tangency Theorm:__** If a line is tangent to a circle, then the line is **perpendicular** to a radius of the circle drawn to the point of tangency
 * __Radius and Chord Theorm:__** A radius that is perpendicular to a chord of a circle **bisects** the chord.
 * __Converse of the Tangent Theorm:__** If a line is perpendicular to a radius of a circle at its endpoint on the circle, then the line is **tangent** to the circle.
 * __Theorm:__** The perpendicular bisector of a chord passes through the cente of the circle.