Penny Circles

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$12.00
12 66 $12.00 - $66.00
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These labeled circles are a physical version of this quadratic modeling activity where students graph the number of pennies (or nickels) that fit flat in a circle with the diameter of the corresponding circle.


I have found that it's best to have a complete set of rings for each group but groups can also share if you don't have enough for that.

Free Files to Download and Print

As with everything on this site, I want to make everything available to teachers for free. If you have access to a 3D printer, I have posted the files in the following locations