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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
Open Middle Logarithm Exercises (1)
Droste effect
How to Assign Color Objects Inside the List? II
Cube of a Binomial - Volume Model
Slipper
Discover Resources
Cercles tangentes
Isosceles Trapezoid
Geogebra Project 2
Question 5
O Level E Math Yearly
Discover Topics
Equilateral Triangles
Poisson Distribution
Limits
Geometric Mean
Mathematics