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GeoGebra

Moss Egg or Euclidean Egg

作者:Arthur Lee
Drag the green dot to change the egg to fish.
See the construction: https://youtu.be/JE-L0VarQzo Based on Robert Dixon's Mathographics https://books.google.com.hk/books?id=1fDgb17bgBkC&lpg=PP1&pg=PA3#v=onepage&q&f=false

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