Google Classroom
GeoGebraClasse GeoGebra

Circumference of a Circle and Pi

This activity allows you to measure the circumference of a circle by wrapping a string around it.
  • Drag the blue point to change the diameter of the circle.
  • Measure the circumference.
  • Calculate the ratio of the circumference to the diameter 
  (enter first "=" followed by "circumference/diameter").