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Dissections 1+3=√10

Here we consider the problem (proposed by Livio Zucca) to dissect a polyomino of side 1 and its triple in the smallest number of pieces that can be rearranged to form a similar polyomino sqrt(10) times larger (since 1+9=10). For other dissection problems see here.

If you know/find better solutions, please let me know. (Drawings by Livio Zucca).