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Optimal deposition orientation in fused deposition modeling for maximizing the strength of three-dimensional printed truss-like structures - João Fiore Parreira Lovo, Carlos Alberto Fortulan, Maíra Martins da Silva, 2019
Five toothpicks of equal length are joined end to end to form an equilateral figure. What is the maximum number of right angles found at the vertices? - Quora
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