Hero of Alexandria

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Noun1.Hero of Alexandria - Greek mathematician and inventor who devised a way to determine the area of a triangle and who described various mechanical devices (first century)Hero of Alexandria - Greek mathematician and inventor who devised a way to determine the area of a triangle and who described various mechanical devices (first century)
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Heron of Alexandria invented the first steam engine.
One of the greatest was Heron of Alexandria, whose strange innovations, such as automatic doors and robotic theatres, were famed through- out the ancient world.
In the first century, the mathematician-engineer Heron of Alexandria encountered i in a separate project but fudged the arithmetic; medieval mathematicians stumbled upon the concept while grappling with the meaning of negative numbers but dismissed their square roots as nonsense.