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Dudeney's puzzle + lesson plan
Author:
Ivan De Winne
Dudeney's famous haberdasher puzzle (1908) Cut an equilateral triangle into four pieces that can be arranged to form a square with the same area
GeoGebra
New Resources
Exploring Number of Squares on the Diagonal of a Rectangle
Rotation in Cartesian Plane
Equilateral Triangle Cross Sections
Weighing Scales (kg & g)
z`]]
Discover Resources
Geogebra Picture 1
Five segments
Forrest, Jalen Final Interactive Worksheet
gusano que se mueve deslizador
Completing the Square (3)
U.S. Cities
Discover Topics
Incircle or Inscribed Circle
Coordinates
Sequences and Series
Perimeter
Probability