Circumference of a Circle
In the activity below, the circumference of the circle is given, along with the diameter.
Grab the blue point to change the diameter of the circle, and watch the circumference change also.
Can you find a relationship between the diameter and circumference?
Hint: Try dividing.
Put into words what you have found out.
Ask you teacher about this really special number you have discovered.
Grab the blue point to change the diameter of the circle, and watch the circumference change also.
Can you find a relationship between the diameter and circumference?
Hint: Try dividing.
Put into words what you have found out.
Ask you teacher about this really special number you have discovered.
Ideas for Teachers
The activity investigating the circumference of a circle is an excellent introduction to the concept of Pi, and getting students to discover this for themselves is the best way to get them to really understand what pi is. Another activity is available on Discovering Pi.
The activity investigating the circumference of a circle is an excellent introduction to the concept of Pi, and getting students to discover this for themselves is the best way to get them to really understand what pi is. Another activity is available on Discovering Pi.
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