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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
Graphing Logarithmic Functions
Open Middle Logarithm Exercises (1)
Flag in the wind
What if the Exponent is an OUTPUT?
Monkey typing Shakespeare's complete works
Discover Resources
Property 1
Investigating the slope of y=x^2
Square Root Function with Slider
ARC ROTATION PATTERN
Toy Car Animation
Discover Topics
Mode
Median Line
Square
Matrices
Translation