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

1. Above the circle, drag the slider with you mouse, 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? (If you have trouble, use the hint slider)
5. Now, looking at this shape the base is equal to what in the original circle? (If you have trouble, use the hint slider)
6. So, putting that together what is the area of a circle?