Archimedes

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a Roman siege by constructing huge lenses to focus the Sun's light on Roman ships and huge cranes to turn them upside down. When the Romans finally broke the siege, was killed by a Roman soldier after snapping at him "Don't disturb my circles", a reference to a geometric figure he had outlined on the sand.
biggest contribution to math, especially geometry, was his discovery for finding the volume of a sphere showing that it is two thirds the volume of the smallest cylinder that can contain it and the definition of Pi. Although Pi was used by the Babylonians and Egyptians it was never really defined as one value. finally determined the true value by using six, twelve, forty-eight, and ninety-six sided polygons to better approximate the value. volume of a sphere formula looks like this:
Vol(Sphere) = Vol(Cyl) - Vol(Cones)
For his time a was a brave and very intelligent man who set out to think of and invent things that no one else had ever thought of. A quote of his best ...

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