Proof Pythagorean facts
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The 20th President of the US, James A. Garfield, contributed an original proof of the Pythagorean Theorem before he became president. He came up with it during a discussion with other members of Congress, and it was published in the New England Journal of Education.
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Expresident James A. Garfield contributed to an original proof of the Pythagorean Theorem
What is the missing justification in the proof of the pythagorean identity below sin^2x+cos^2x=1?
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what is the missing justification in the proof of the pythagorean identity sin^2x+cos^2x=1?

In 1980, Ronald Graham offered a prize of $100 for anyone who could solve his "Boolean Pythagorean Triples Problem." Last year, three computer scientists solved the puzzle, using a supercomputer over the course of 2 days, and came out with a proof that takes up 200TB of storage space.

President James A. Garfield created his own unique proof for the Pythagorean Theorem while he was serving in the US House of Representatives in 1876

20th president of the US, James Garfield discovered an original proof of Pythagorean theorem while he was a member of the House of Representatives. A math historian called it "really a very clever proof."

The pythagorean theorem has more than 300 different proofs.

James A. Garfield, the 20th president of the United States, published a proof of the Pythagorean Theorem, making him the only US president to have published a mathematical proof so far

The the 20th President of the United States (James A. Garfield) developed a Proof of the Pythagorean Theorem.

President Garfield (20th US president) developed his own proof of the Pythagorean Theorem

A solution to creating a simple perfect squaring (creating smaller squares w/in the larger) of a torus (donut) created in ~900CE is also a proof of the Pythagorean Theorem.

In 1876, future President James A. Garfield published an algebraic proof of the Pythagorean Theorem
Why is it pronounced jif?
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POTUS James Garfield discovered a proof of the Pythagorean Theorem during a mathematics discussion with his colleagues as a seated member of Congress in 1876. The proof was later published in the New England Journal of Education.