he fiqued out the height of a pyramid using the length of its shadow and he was one of the first people to use geometry to solve practical problems.
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There is no Contribution of Thales in the field of trignometry.........
iuygniggt
it has helped in finding the perimeters and areas of circle.
Thales, Democritus, Pythagoras, Aristotle, Archimedes, Euclid, Erastosthenes, Hipparchus,
he was a bad man & contribution was i dont know