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Dudeney's Cross-to-Isosceles-Right-Triangle Dissection


	This Demonstration gives Dudeney's (1897) dissection of a four-piece hinged cross into an isosceles right triangle.


	Contributed by: Izidor Hafner Based on work by: Greg N. Frederickson
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Henry Ernest Dudeney (1857-1930) was a self-educated English mathematician. Collections of his puzzles appeared in five books.

G. N. Frederickson, Dissections: Plane & Fancy, New York: Cambridge University Press, 1997.

G. N. Frederickson, Hinged Dissections: Swinging & Twisting, New York: Cambridge University Press, 2002 p. 19.

Contributed by: Izidor Hafner

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