What methods of constructing a right angle did Thales know? What new added to this Pythagoras?
| October 31, 2020 | Education
Thales knew how to lower a perpendicular to a straight line from a point outside the straight line. He could also use the Egyptian recipe: a triangle with side lengths 3, 4, 5 is rectangular.
Pythagoras already knew that any angle inscribed in a circle and based on its diameter is straight.
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