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
"The postulates are not self-evident, but they are necessary for the development of geometry."
Strange & Unusual"And the point is called the center of the circle."
Strange & Unusual"The angles in the same segment are equal to one another."
Strange & Unusual"What has been affirmed without proof can also be denied without proof."
Strange & Unusual"Further, of trilateral figures, a right-angled triangle is that which has a right angle, an obtuse-angled triangle that which has an obtuse angle, and an acute-angled triangle that which has its three…"
Strange & Unusual