1. Circles

2. Parts of a Circle Center The diameter is the distance across the circle through the center The radius is the distance to the center point

3. Circumference

4. Finding the Circumference 1)Determine whether you are given the diameter or the radius of the circle -Diameter is the entire length across the circle -Radius is only to the center point 2)Apply the correct formula and simplify -Calculate using π last using 3.14 as π -Round to the nearest tenth and use units given Find the circumference

5. Example Find the circumference

6. Guided Practice Find the circumference

7. Finding the Area Find the area

8. Example Find the area

9. Guided Practice Find the area