1. 1)Find the circumference and area of a circle with a diamater of 10 in. Round to the nearest hundredth. Do not forget the units! 2) What would be the radius of a circle if the area is cm 2 ? C = 31.42 in., A = 78.54 in. 2 radius = 8 cm

3. Distance around the circle

4. C =  d C= 2  r

5. Find the circumference in terms of pi and to the nearest tenth

6. Portion of the circumference P A B

7. Your Turn: Find the length of AB. ( A B 150 o 34 cm.

8. Ex 2: Find the m LM. Notice that we are given the arc length and need to find the measure of the arc!! ( C L 16.76 in. 8 in. Put in calc!! M

9. Your Turn: Find the m AB. ( C B 18.84 m. 9 in. A

10. Ex 3: Find the circumference of circle C. 45 o 10.2 cm R S C Put in calc!!

11. Your Turn: Find the radius of circle C. READ the directions carefully!!! 45 o 1.57 ft R S C

12. Your Turn: Find the circumference of circle C. 200 o 41.87 cm A B C