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character: Ptolemy
topic: Geography and Earth Measurement Techniques
grade: 8
subject: Mathematics
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character: Eratosthenes
topic: Calculating the Earth's Circumference
grade: 8
subject: Mathematics
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character: Hipparchus
topic: Advancements in Geography and Cartography
grade: 8
subject: Mathematics
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character: Claudius Ptolemy
topic: Influence on Modern Cartography
grade: 8
subject: Mathematics
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