If a straight line be drawn from the ends of a straight line, it will be a triangle.
Father of geometry
Paraphrased from implications within 'Elements', not a direct definition.
c. 300 BCE
Found in 1 providers: grok
Cross Reference
1 source
"And the whole is greater than the part."
Philosophical"The properties of figures are derived from their definitions and postulates."
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"That which is without parts has no magnitude."
Shocking"Rectilineal figures are those which are contained by straight lines..."
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