Circles

1
Circles
SOL 6.12 Mrs. Norman John Rolfe Middle School
2
Circles

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

3
Diameter

• The distance across the circle. The length of any
  chord passing through the center. It is twice the
  radius.
• http//www.mathopenref.com/diameter.html

http//www.teachertube.com/view_video.php?viewkey
250aabb9ffb2683e0792
4
Radius

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

5
Chord

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

6
Circumference

• The circumference is the distance around the
  circle.

7
Pi 3.14
3.14 3.14 3.14 3.14 3.14 3.14 3.14 3.14 3.14 3.14
3.14 3.14 3.14 3.14 3.14 3.14
http//www.youtube.com/watch?vVqpWETqoD5Q
8
Calculating Circumference
http//www.teachertube.com/viewVideo.php?video_id
38335
http//www.youtube.com/watch?vfogehnFNDw0
9
Calculating the Area of a Circle

• Area enclosed by a circle - Math Open Reference
• A r²

10
(No Transcript)
11
(No Transcript)
12
(No Transcript)
13
(No Transcript)
14
(No Transcript)
15
Now You Know All About Circles