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In any right-angled triangle the square on the hypotenuse is equal to the sum of the squares on the other two sides. | ![]() |
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![]() James A. Garfield (1831-1881). Twentieth American President. Oil on Canvas by Ole Peter Hansen Balling. National Portrait Gallery, Washington. Garfield was shot by a disappointed office seeker four months after becoming president and died from his wounds several weeks later. |
Jim Garfield dabbled in mathematics.
In 1876 he published this simple and elegant proof.
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