Thales：a presocratic Greek philosopher and astronomer. All is water. Geometry，tbe essential theory of the triangle.
Pythagoras：Greek philosopher，the famous equation that showed how in a right-angled triangle： a2+b2=c2
Aristotle：Plato‘s star pupil，philosopher，the earth was motionless and the center universe
Euclid：Elements，mathematician’s book，geometry，five postulates
Archimedes：the law of the lever，displacement theory，piThales：a presocratic Greek philosopher and astronomer. All is water. Geometry，tbe essential theory of the triangle.
Pythagoras：Greek philosopher，the famous equation that showed how in a right-angled triangle： a2+b2=c2
Aristotle：Plato‘s star pupil，philosopher，the earth was motionless and the center universe
Euclid：Elements，mathematician’s book，geometry，five postulates
Archimedes：the law of the lever，displacement theory，pi
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