character: Euclid
topic: Mathematics of Proportions and Scale
grade: 9
subject: Mathematics
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character: Pythagoras
topic: Theorems in Proportions
grade: 9
subject: Mathematics
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character: Archimedes
topic: Applications of Scale in Geometry
grade: 9
subject: Mathematics
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character: Leonhard Euler
topic: Historical Contributions to Proportionality
grade: 9
subject: Mathematics
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