GeoGebra Institute of Hong Kong

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  • 1. Construction Problems
    • 1. Construct a regular pentagon
    • 2. Problems in the first workshop of GIHK
  • 2. Dissection Problems
    • 1. Dissecting Quadrilaterals
    • 2. Cut Triangles into Rectangles & Dudeney’s Puzzle Generalized
    • 3. Dissecting Rectangles into Squares
  • 3. Games & Puzzles
    • 1. Chinese Match Puzzles
    • 2. 中國火柴遊戲
    • 3. Upside Down?
    • 4. A Square in Parallel Lines
    • 5. Chocolate Bar Paradox
    • 6. Diagonal Problem
  • 4. Proofs without Words
    • Feynman's Triangle
    • Two Squares
  • 5. Miscellaneous
    • Circle Pattern Animation
    • Dividing a Trapezium
    • Fishy Tessellation
    • Fractals by Iterations in Spreadsheet
    • Happy Halloween
    • Happy Halloween
    • Making strange shapes from a circle and quadrilateral
    • Moon and Sea
    • Napoleon Tiling
    • Radiation
    • Sine curve rotated

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