Tetriamond

See also

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More things to try:

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• adjugate {{8,7,7},{6,9,2},{-6,9,-2}}
• (complement S) intersect (A union B)

Cite this as:

Weisstein, Eric W. "Tetriamond." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Tetriamond.html

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