On Your Blog...
You are probably already familiar with degrees as a way of measuring angles. For example, most people know that 360 degrees is a full rotation around a circle; 180 degrees is a half rotation, and 90 degrees is a right angle. Are there other ways to measure angles?
Write a blog post explaining the concept of arc length and how it might be used to measure angles. Provide examples with pictures. (You may want to take some screenshots of your work in this GeoGebra Book.) How far around a circle is ? What about ? How could you use this information to measure angles? What would you label a 45 degree angle in this alternate system? How did you label the angles on the previous page?