Around which period was Xenon active?
223–187 BC
445-400 BC
33-30 AD
1000-980 BC
Answer
Xenon of Ephesus was an ancient Greek astronomer and mathematician, active around 223–187 BC. He was the first to calculate the Earth's circumference and he also developed the earliest known trigonometric tables.
Unraveling Xenon: Test Your Knowledge on the General Officer (223–187 BC)
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