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The diagram shows three squares on the sides of a triangle $ABC$.
Their areas are respectively 18 000, 20 000 and 26 000 square centimetres.
If the squares are joined, three more triangular areas are enclosed. What is the area of this convex hexagon?
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NRICH is part of the family of activities in the Millennium Mathematics Project.
NRICH is part of the family of activities in the Millennium Mathematics Project.