This activity can help students learn the relationship between angles in radians and degrees visually through a PIE! Students should have covered the basic concept of radian measure. So this activity provides the learner a simple and easy to form mental model of switching between degree and radian measure

 This resource is downloadable from Geogebra Tube at: 


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Change the number of parts to see the PIE divided into more parts.


PIE Model for Relationship between Radians and Degrees

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