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a² + b² = c²을 사용하여 직각삼각형의 변을 계산하세요.
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- The Pythagorean theorem was known in Babylon and Egypt at least 1,000 years before Pythagoras — a clay tablet called Plimpton 322 (~1800 BC) lists Pythagorean triples with no reference to Greece.
- There are over 370 known mathematical proofs of the theorem, including one submitted to the American Mathematical Monthly by future US President James A. Garfield in 1876.
- Ancient Egyptian surveyors called "rope stretchers" (harpedonaptai) used the 3-4-5 right triangle property to create perfect right angles for construction.