Halfway Around a Circle

Dr. Fisher, Ronan Downes, 14/03/2020

This GeoGebra Book introduces the concept of arc length. You will create different arcs around different circles. You'll measure the arc length, and study its properties. Finally, we'll consider how arc length could be used to measure an angle.


  • 1. Arc Length 1
  • 2. Arc Length 2
  • 3. Arc Length 3
  • 4. Arc Length 4
  • 5. Arc Length 5
  • 6. Radians Game
  • 7. On Your Blog...

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Arc Length 1

– Dr. Fisher

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