Pythagoras

# Who was Pythagoras?

Pythagoras (c. 580-500 B.C.) was an ancient Greek philosopher

who was interested in numbers and their meanings. He discovered the

relationships between mathematics and music, proposing that sounds

and their relationships with other sounds can be measured using

numbers. He also proposed that the Earth is a sphere, that the

Earth, Moon, and stars revolve around the Sun, and that astronomy

(the study of stars, planets, and heavenly bodies) could be written

as mathematical sentences called equations. Pythagoras and his

followers used lines, triangles, and squares made out of pebbles to

represent numbers.

Today Pythagoras is best remembered for the Pythagorean theorem:

The square of the length of the hypotenuse (the side of a right

triangle opposite the right angle) of a right triangle equals the

sum of the squares of the lengths of the triangle's other two

sides.

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