A 4-polyhex.
Wave
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References
Gardner, M. Mathematical Magic Show: More Puzzles, Games, Diversions, Illusions and Other Mathematical Sleight-of-Mind from Scientific American. New York: Vintage, p. 147, 1978.Referenced on Wolfram|Alpha
WaveCite this as:
Weisstein, Eric W. "Wave." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Wave.html