Today in class we did a worksheet on pi. Not the kind you eat (unfortunately ;)) the number kind (3.14). We were given five objects that we had to find the circumference and diameter of. We took a meter stick and a piece of string as tools for measuring. Then we collected our data and wrote it down on our worksheets and found the relationships of the measurements.
Radius is half of the diameter. The circumference is the diameter times pi, or two times pi times the radius. This was a great activity because learning by doing is so much more effective than just memorizing a formula.
Here is a video I found that is helpful when making connections with pi.
I enjoyed this activity, measuring the different objects in class. It made learning about the circumference more fun.
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