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Nikita Iljin
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nikita.iljin
GeoGebra
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bewijs stelling van Pythagoras
巧算長方形周界
Open Education 2026
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Perimeter of a Rectangle with Unknown Sides
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day 98
Retângulo de área máxima
Coefficients directeurs à classer
Kaleidoscope
What Sine, Cosine, and Tangent Actually Mean
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Special Points
Numbers
Ratios
Geometric Distribution
Plane Figures or Shapes