English version

Pythagoras

From Longman Dictionary of Contemporary EnglishPythagorasPy‧thag‧o‧ras /paɪˈθæɡərəs $ pə-/  (?582-?507BC) a Greek philosopher and mathematician, known for Pythagoras' Theorem, a way of calculating the length of one side of a triangle which has one angle of 90°, when you already know the length of the other two sides
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