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If the sides of the triangle in the diagram are 3, 4 and 5, what is the area of the shaded square?

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Triangular Tantaliser

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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.
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