Stage: 3 Challenge Level: 
Explain how the thirteen pieces making up the regular hexagon shown in the diagram can be re-assembled to form three smaller regular hexagons congruent to each other.
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Mixed triangles. Visualising. Area. Circles. Hexagons. Congruence. Mathematical reasoning & proof. Enlargements. Pythagoras' theorem. Regular polygons.
Published September 2001.
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