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  12. Building on the Shoulders of Giants: 1998 Putnam Exam A1, 2.0 in GeoGebra 3D

    Building on the Shoulders of Giants: 1998 Putnam Exam A1, 2.0 in GeoGebra 3D

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  21. All triangles with equal base and equal area have equal height | Euclid's Elements Book 1 Prop 39

    All triangles with equal base and equal area have equal height | Euclid's Elements Book 1 Prop 39

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