This document covers geometry concepts related to arcs, chords, and theorems in circles. It discusses the relationship between arcs and chords, and theorem 10.3 which states that if a diameter or radius is perpendicular to a chord, it bisects the chord and its arc. The document provides examples and homework problems, and outlines a lesson plan to introduce rules about the relationship between chords and arcs over two class periods, including notes, examples, and a review quiz.

1. SECTION 10.3
Arc and Chords

2. ANGLE AND ARCS
 What is the relationship between arcs and chords?
 How can I use the relationship between arcs and
chords to solve problems?

3. TESSELLATION


4. TESSELLATIONS


5. THEOREM 10.2


6. INSCRIBED/CIRCUMSCRIBED

A B
X
D C

7. THEOREM 10.3
 Theorem 10.3 – In a circle, if a diameter (or radius)
is perpendicular to a chord, then it bisects the chord
and its arc.
 If…
Then…
And…

8. EXAMPLE


9. EXAMPLE


10. THEOREM


11. EXAMPLE


12. HOMEWORK
 Page 540
 #12 – 34 Even
 40 – 43 all

13. LESSON PLAN
 Intro
 Develop some rules about the relationship between
chords and arcs
 Standards- 9.3
 Supplies – slides, whiteboard, note sheets
 Timing: One day for notes, one day for a combined
review of 10.3 and 10.4 and a quiz.
 Day 1:
 Essential Questions- slides 2
 Input-slides 5 – 7, 10
 Guided Practice - slides 3, 4, 8, 9, 11
 Independent Practice – Book Work