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For which N's is it possible to make a perfect square using all the pieces from N sets of Tangrams?

Example: We know you can make a square with one set of tangrams. If you take all the pieces from two sets, can you make a square? How about with three sets? Four? More? Explain why some of the numbers work and some don't.Tangrams are seven polygons that fit together to form many different shapes, one of which is a square. If you don't have access to tangrams, you can expand the picture and print it out.

- Annie Fetter

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