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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
Monkey typing Shakespeare's complete works
Rings of circles
Road Runner (beep, beep)
Cube of a Binomial - Volume Model
Droste effect draft
Discover Resources
Dona Putra
Evaluare Națională Varianta 4.
Simple Rational Models
Sierpinski Triangle
An isosceles triangle - 15082019
Discover Topics
Calculus
Constructions
Cosine
Integers
Piecewise Functions