The postulates are not self-evident, but they are necessary for the development of geometry.
Father of geometry
Implied understanding from the structure of 'Elements', though not a direct quote.
c. 300 BCE
Found in 1 providers: grok
Cross Reference
1 source
"Of quadrilateral figures, a square is that which is both equilateral and right-angled; an oblong that which is right-angled but not equilateral; a rhombus that which is equilateral but not right-angle…"
Shocking"A ratio is a sort of relation in respect of size between two magnitudes of the same kind."
Strange & Unusual"The only purpose of the 'Elements' is to demonstrate mathematically certain fundamental propositions."
Shocking"A straight line is that which lies evenly between its extreme points."
Strange & Unusual"To produce a finite straight line continuously in a straight line."
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