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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
Poorly Drawn Parallelograms 2
Poorly Drawn Parallelograms
alg2_05_05_01_applet_exp_flvs
alg2_05_05_01_applet_exp_2_flvs
Flip Flop
Discover Resources
PROVAradicecubica
Morphing squares
HW Distance# 1
Untitled
LMOrigami18 Cairo Tessellation Variable Animation
Discover Topics
Solids or 3D Shapes
Parallelogram
Expected Value
Conditional Probability
Reflection