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Discovering areas with jigsaw pieces. “The whole is greater than the sum of its parts" Aristotle (384‒322 B.C.). (Mit Puzzle-Teilen Flächen entdecken. “Das Ganze ist mehr als die Summe seiner Teile" Aristoteles (384‒322 v. Chr.).) (German)
PM Prax. Math. Sch. 56, No. 55, 21-23 (2014).
Classification: G33 G43 U63
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Ideas. The puzzleball. (Ideenkiste. Der Puzzleball.) (German)
Math. Lehren, No. 162, 66-67 (2010).
Classification: G40 U60 Reviewer: Renate Stürmer (Zweibrücken)
2
Ideas. (Ideenkiste.) (German)
Math. Lehren, No. 149, 64-65 (2008).
Classification: U44 F64 D84 Reviewer: Renate Stürmer (Zweibrücken)
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