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Objective
Define tangent and secants of a circle Understand the relationship between tangents and certain radii of the circle Understand the geometry of a radius perpendicular to a chord of a cicle

=Definitions= Secant-a line that intersects any circle at two points Tangents-a line in the plane of a circle that intersenct the circle at one point Point of tangency-the exact point a tangent lands on the circle

Theoroms
Tangent Theorem-if a line is a tangent to a circle then the line is perpendicular to the radius of the circle Converse of the Tangent Theorem-If a line is perpendicular to a radius of a circle at its endpoint on the circle then the like is a tangent to the circle Radius and Chord Theorem-A radius that is perpendicular to a chord of a circle bisects the chord Example say that you have this circle with this chord and this radius Another theorem of this chapter that is good to know it this... The perpendicular bisecter of a chord passes throught the center of the circle...just saying this...because the radius of the circle is the bisector of the circle we know that the bisector of the chord must go through the center of the circle like this...

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