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=Chapter 9.1 Chords and Arcs=

Objectives:

-Define a circle and its accotiated parts, and use them in constructions. -Define and use the degree measure of arcs. -Define and use the length measure of arcs. -Prove a theorem about chords and their intercepted arcs.

Radius: A segment from the middle to the outside point. Chord: Endpoints line on a circle. Diameter: Chord that contains center of the circle. Arc: Unbroken part of a circle. Endpoints: The points on the arc. Arc Length: L=M/360°(2x3.14r) [|] =Chapter 9.2 Tangents to circles=

Objectives: -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. -Secant: line that intersects at 2 points. -Tangent: line in the plane of the circle that intersects the circle at one point. -Point of tangency: Defining what tangent is. =Chapter 9.3 Inscribed angles and Arcs=

Objectives: -Define inscribed angle. -Develop and use the Inscribed angle theorem and its corollaries.

-Inscribed angle: An angle whos vertex lies on a circle.

=Chapter 9.4 Angles formed by secants and tangents=

Objectives: -Define angles formed by secants and tangents of circles. -Develop and use theorems about measures of arcs intercepted by these angles.

=Chapter 9.5 Segments of Tangents, Secants, and Chords=

Objectives: -Define special cases of segments