Click on the link below to access eTool.
Unit Circle and Radians
Use this eTool to demonstrate/summarize students findings concerning the relationship between the radius of a circle and radian measurement.
1. Click on the BLUE points (Radians and Radius sliders) and drag horizontally to find the arc length for a particular radius and radian measure.
![](https://media.screensteps.com/image_assets/assets/002/434/746/original/4dca06eb-0ad5-4ef7-ae65-3868ba8a56de.png)