1. Warm Up 4. Label the circle with the following parts: radius, diameter, circumference

3. Radius Center Diameter Circumference The diameter d is twice the radius r. d = 2r Course 3 8-3 Circles

4. Radius: is a line segment with one endpoint at the center of a circle and the other endpoint on the circle. It is ½ the diameter. Diameter: is a line segment that passes through the center of a circle and has endpoints on the circle. It is double the radius. Circumference: is the distance around a circle. Center: is the point within a circle that is the same distance from all points on the circle.

5. TB Pg 343

6. Formula__________ Substitute_________ Solve________ Answer__________

7. Formula__________ Substitute_________ Solve________ Answer__________

8. Your turn! Page 346: a-d

10. A. Circle with a radius of 4 m C = 2r B. Circle with a diameter of 3.3 ft C = d Find the circumference of each circle, both in terms of  and to the nearest tenth. Use 3.14 for . Formula__________ Substitute_________ Solve________ Answer__________ Formula__________ Substitute_________ Solve________ Answer__________

11. Formula__________ Substitute_________ Solve________ Answer__________

12. Your turn! Page 347: e-f

13. Formula__________ Substitute_________ Solve________ Answer__________

14. Homework: Lesson 4 Reteach & Homework Practice Evens