In this worksheet you will investigate the area of a circle.

1. Drag the animate slider, write down what happened. 2. What shape did the circle turn into? 3. What is the area formula for that shape? 4. Now, looking at this shape the height is equal to what in the original circle? 5. Now, looking at this shape the base is equal to what in the original circle? 6. So, putting that together what is the area of a circle?