Greek philosopher Pythagoras discovered that the sum areas of two squares on two sides of a triangle will always add up to the area of a square on the hypotenuse – the longest side of a right angle triangle.
However, Pythagoras was not born until the 5th century BC – some 2,000 years after Stonehenge was erected.
…Contributor and editor of Megalith, John Matineau, told the Telegraph: “People think of our ancestors as rough cavemen but they were applying Pythagorean geometry over 2,000 years before Pythagoras was born.
…They were astronomers and cosmologists. …“They were studying long and difficult to understand cycles and they knew about these when they started planning sites like Stonehenge.