Our unit of multi-media area (a fuller2) is:
The game in this puzzle is to compare the distance across a circle to the area enclosed by the circle. To find the area enclosed by the below red circles, you need to total the full and fractional fuller2 enclosed by the circle. The fuller2 that are essentially fully inside the circle have been colored green for you. The fuller2 that are only partially in the circle have been colored yellow -- you need to judge what fraction is enclosed. Sometimes I've counted the number of green fuller2 for you to save time.