Maths Olympiad Prep

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Geometry Difficulty 3.0 AMC 10/12 Prove it United Kingdom

A square ABCDABCD has side 40 units. Point FF is the midpoint of side ADAD. Point GG lies on CFCF such that 3CG=2GF3CG = 2GF. What is the area of triangle BCGBCG?

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