Stage: 1 Challenge Level: 
Explore ways of colouring this set of triangles.
Can you make symmetrical patterns? With two colours? Three
colours? More than three colours?
Can you colour the small triangles, using four colours, with no
two triangles of the same colour side-by-side?
Multiplication & division. Sequences. Practical Activity. Area. Equilateral triangles. Addition & subtraction. Combinations. Working systematically. Symmetry. Investigations.
Published April 2000,January 2009.
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