Jerry
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Iron (26 Fe)
Iron Age (1100 to 150 BC)
Classical (Antiquity) Era (500 BC to 400 AD)
Ancient Greece
Ancient Greek Philosophers
Euclid
Geometry
Types of Geometry
Absolute Geometry
Attachments
Absolute geometry - Wikipedia
Parents
János Bolyai
Parallel Postulate (Euclid’s fifth)
Types of Geometry
Children
How One Line in the Oldest Math Text Hinted at Hidden Universes