Pythagoras was known for creating the Pythagorean Theorem, which was named after him. The Pythagorean Theorem uses the equation [tex]a^2+b^2=c^2[/tex] to find the sides of a right triangle.
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Ptolemy believed that Earth was at the center of the universe, not the Sun.
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Archimedes was known for discovering the law of hydrostatics, which says that a body put in fluid loses weight equal to the weight of the amount of fluid it displaces.
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Eratosthenes was famous for making the first measurement of the size of Earth.
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