Mention501041

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so:text As a square number is known to be the product of a number multiplied by itself, so every polygonal number, multiplied by one number and added to another, both of which depend upon the number of its angles, produces a square number. I shall prove this, and shall show also how from a given side to find its polygon and conversely. Some auxiliary propositions must first be proved. (en)
so:isPartOf https://en.wikiquote.org/wiki/Diophantus
so:description Arithmetica (c. 250 AD) (en)
qkg:hasContext qkg:Context247111
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