570 BC ± 10
Description
Thales of Miletus, considered as the first philosopher in the Greek tradition, uses deductive reasoning applied to geometry for the first time to prove the Thales' theoremLocation
Ancient GreeceRate
Very important (8)Sphere
ScienceQuotations
In a circle the angle in the semicircle is right, that in a greater segment less than a right angle, and that in a less segment greater than a right angle; and further the angle of the greater segment is greater than a right angle, and the angle of the less segment less than a right angle.
