2. Circles… SOL 6.12 Mrs. Norman John Rolfe Middle School

3. Circles A circle is a set of points that are the same distance from a fixed point, A http://www.mathopenref.com/circle.html

4. Diameter The distance across the circle. The length of any chord passing through the center. It is twice the radius.chord http://www.mathopenref.com/diameter.html http://www.teachertube.com/view_video.p hp?viewkey=250aabb9ffb2683e0792

5. Radius The distance from the center to any point on the circle. It is half the diameter. http://www.mathopenref.com/radius.html

6. Chord A line segment linking any two points on a circle. http://www.mathopenref.com/chord.html

7. Circumference The circumference is the distance around the circle.

8. Pi = 3.14 http://www.youtube.com/watch?v=VqpWETqoD5Q

9. Calculating Circumference http://www.teachertube.com/vie wVideo.php?video_id=38335 http://www.youtube.com/watch?v=fogehnFNDw0

10. Calculating the Area of a Circle Area enclosed by a circle - Math Open Reference Area enclosed by a circle - Math Open Reference A= r²

16. Now You Know All About Circles