A circle is a plane figure contained by one line such that all the straight lines falling upon it from one point among those lying within the figure are equal to one another.
Father of geometry
Definition 15, Book I of 'Elements'
c. 300 BCE
Found in 2 providers: grok,deepseek
Cross Reference
2 sources
"To inscribe a regular hexagon in a given circle."
Strange & Unusual"Let it be granted that a finite straight line may be produced to any length in a straight line."
Strange & Unusual"To construct an equilateral triangle on a given finite straight line."
Strange & Unusual"The elements of geometry are derived from a small set of axioms and postulates."
Strange & Unusual"The properties of figures are derived from their definitions and postulates."
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