1. 11.4 Circumference and Arc length

2. Concept #1 Circumference H B X M

3. Example #1 H B X M MB=14 cm

4. Example #2 H B X M Diameter =17.2 cm

5. Concept #2 Arc Length H B X M The arc length is the part of the circumference. The arc length = the central angle ratio times the full circumference.

6. Example #3 H B X M R=3.4 mm ∠MBH = 42° Find the Arc Length

7. Example #4 A C X B Arc AB=42 cm ∠BCA = 63° Radius=___

8. Example #5 A C X B Arc AXB=45 cm ∠BCA = 20° Radius=___

9. 11.4 H.W. pg 686 #15-29 all 33-35 all