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  5. All triangles with the same base and height have equal area | Euclid's Elements Book 1 Prop 38

    All triangles with the same base and height have equal area | Euclid's Elements Book 1 Prop 38

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  8. Bitcoin is how to construct a triangle given 3 compatible sides | Euclid's Elements Book 1 Prop 22

    Bitcoin is how to construct a triangle given 3 compatible sides | Euclid's Elements Book 1 Prop 22

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  21. The angle opposite the biggest side is always the biggest angle | Euclid Elements Book 1 Prop 18

    The angle opposite the biggest side is always the biggest angle | Euclid Elements Book 1 Prop 18

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  22. 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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