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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.
RELATED LINKS
Dissection
(
Wolfram
MathWorld
)
PERMANENT CITATION
"
Dudeney's Cross-to-Isosceles-Right-Triangle Dissection
" from
the Wolfram Demonstrations Project
http://demonstrations.wolfram.com/DudeneysCrossToIsoscelesRightTriangleDissection/
Contributed by:
Izidor Hafner
Based on work by:
Greg N. Frederickson
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Related Topics
Plane Geometry
Recreational Mathematics
Triangles
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Related Curriculum Standards
US Common Core State Standards, Mathematics
1.G.A.2
3.G.A.2
5.G.B.4
8.G.A.1
8.G.A.3
8.G.A.4
HSG-CO.A.5