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We had a couple of solutions, Sam sent in these pictures of four different squares to us:

 


smallest square

square from two red triangles

square from two red and one blue triangles

square from two green triangles

 

 

 

The fifth and largest square uses all the pieces as in the picture.

We had a solution sent in from Horatio at St Johns College School Cambridge:
 

 

 

Thank you for these submitted solutions, well done!
 

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The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice.

NRICH is part of the family of activities in the Millennium Mathematics Project.

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