The activity begins with a photo of a large roll of red carpet. What follows are the following questions:
1) How long is the carpet?
2) How long will it take to unroll the carpet?
3) How large is the carpet?
What follows this first "ACT" are images and videos that provide students with more and more information that help them discover possible answers to these questions.
This activity talks about distances around a circle and through the diameter, comparing them; which is shorter?
It can be a simple one or expanded to be quite complex.