Things which coincide with one another are equal to one another.
Father of geometry
Common Notion 4, from 'Elements'
c. 300 BCE
Found in 3 providers: grok,deepseek,gemini
Cross Reference
3 sources
"A plane angle is the inclination to one another of two lines in a plane which meet one another and do not lie in a straight line."
Strange & Unusual"If two triangles have two sides equal to two sides respectively, and have the angles contained by the equal straight lines equal, they will also have the base equal to the base, the triangle will be e…"
Strange & Unusual"Rectilineal figures are those which are contained by straight lines..."
Shocking"Magnitudes which can be made to coincide are equal."
Strange & Unusual"If a number be the least that is measured by any prime numbers, it will not be measured by any other prime number except those originally measuring it."
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