3 slides showing various arrangements of a set of polygons. What is the true area? Why are there 3 different answers? Notebook and PowerPoint formats available.
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Great, just what I was looking for - puzzle the intuition about the idea of conservation of area - under the operation of cutting ? rigid twists ? enlargement ... da ! Stretched triangle / Triangle of constant height ! We'll always have a keen eye for properties that are conserved.
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