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puzzle - Prove that there is only one way to make a square using all seven tangram pieces - Mathematics Stack Exchange
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Tangram Incomplete square 7 - Tangram solution #179 - Providing teachers and pupils with tangram activities
![The tangram puzzles used in the experiment along with their solutions.... | Download Scientific Diagram The tangram puzzles used in the experiment along with their solutions.... | Download Scientific Diagram](https://www.researchgate.net/publication/304451949/figure/fig2/AS:377180497432577@1466938246554/The-tangram-puzzles-used-in-the-experiment-along-with-their-solutions-From-left-to.png)