1. Arcs and Chords Section 10-3

2. Theorem 9-1 In a circle or in congruent circle, two minor arcs are congruent iff their corresponding chords are congruent. A B C D

3. A polygon is an inscribed polygon if each of its vertices lies on a circle.

4. Theorem 10-3 In a circle, if a diameter is perpendicular to a chord, then it bisects the chord and its arc. A B C D X

5. Theorem 10-4 In a circle or in congruent circles, two chords are congruent iff they are equidistant from the center. C R B A X P M AX=PM

6. Joke Time What’s a cow’s favorite painting? The Moona Lisa

7. What does the tooth fairy give for half a tooth? Nothing. She wants the tooth, the whole tooth, and nothing but the tooth!