9.2

-Define tangents and secants of circles -Understand the relationship between tangents and certain radii of circles -Understand the geometry of a radius perpendicular to a chord of a circle
 * Objectives:**


 * //Vocabulary:

Secant://** an intersecting line, especially one intersecting a curve at two or more points.


 * //Tangent://** A line in the plane of a circle touching at a single point

line or tangent segment.
 * //Point of tangency://** The point of intersection between a circle and its tangent


 * //Tanget theorem://** If a line is tangent to a circle, than the line is perpendicular to a radium of the circle drawn to the point of tangency.


 * //Radius and chord theorem://** A radius that is perpendicular to a chord of a circle bisects the chord


 * //converse of tangent theorem://** If a line is perpendicular to a radius of a circle at its end point on the circle, then the line is tangent.

This picture's tangent is the sunset touching the oceans line, but the line only touches the circle once

[|This link] will help you understand tangecy better