Question: Where did the formula for area of a circle come from?
Answer: Archimedes
Disambiguated annotations:
qaPairs: question: Where and from who did the formula for area of a circle come from?
answer: Archimedes
question: Where did Archimedes derive the formula for area of a circle come from?
answer: viewing the circle as the limit of a sequence of regular polygons
method of exhaustion,
question: From what literary work did the formula for area of a circle first come from?
answer: The Measurement of a Circle